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READ AND SAVE THESE INSTRUCTIONS
Standard Water
GX Series
Gas Fired Exchanger Humidifi er
Installation Instructions
Operation and Maintenance Manual
FOR YOUR SAFETY:
Do not store or use gasoline or other fl ammable vapors and liquids in the vicinity of this or any other
appliance.
WARNING:
Improper installation, adjustment, alteration, service or maintenance can cause injury or property
damage. Refer to this manual. For assistance or additonal information consult a qualifi ed installer,
service agency, or the gas supplier.
WARNING:
If the information in this manual is not followed exactly, a fi re or explosion may result, causing property
damage, personal injury, or loss of life.
WHAT TO DO IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electrical switch; do not use any telephone in your building.
Immediately call your gas supplier from a neighbor's telephone.
Follow the gas supplier's instructions. If you cannot reach your gas supplier, call the fi re department.
IMPORTANT: Read and save this guide for future reference. This
guide to be left with equipment owner.
ETL/ETLC Listed #43438 To "IAS 12-94 Gas Fired Humidifi er"
Our results are comforting
PURE HUMIDIFIER® and INTAC® are registered trademarks of PURE Humidifi er Co.
Form No: GXOM-6-2023
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Table of Contents
Troubleshooting
Related Manuals for Pure Humidifier GX Series
Summary of Contents for Pure Humidifier GX Series
- Page 1 IMPORTANT: Read and save this guide for future reference. This guide to be left with equipment owner. ETL/ETLC Listed #43438 To “IAS 12-94 Gas Fired Humidifi er” Our results are comforting PURE HUMIDIFIER® and INTAC® are registered trademarks of PURE Humidifi er Co. Form No: GXOM-6-2023...
- Page 2 GX Series Humidifi ers We at PURE Humidifi er Co. thank you for choosing one of our quality products. PURE Humidifi er Co. GX Series humidifi ers are models of simplicity to install, operate and maintain. However, they must be maintained to provide maximum operating effi...
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Page 3: Table Of Contents
Table of Contents Introduction Warnings ………………………………………………………………………………………..Overview Features ………………………………………………………………………………………..Capacities, Electrical & Weights ……………………………………………………………….. GX-3, GX-4 Dimensions & Layout ……………………………………………………………... GX-8 Dimensions & Layout …………………………………………………………....GX-12 Dimensions & Layout ..………………………………………………………………….. Installation Installation & Location …………………………………………………………………….…..Drain Pan Mounting ……………………………………………………………………….…..Electrical, Combustion & Ventilation Air ………………………………………………………. Gas Piping Installation ……………………………………………………………………….…. -
Page 4: Warnings
Warnings PLEASE READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY. PROPER OPERATION AND HUMIDITY CONTROL IS POSSIBLE ONLY WITH PROPER INSTALLATION AND MAINTENANCE. Improper installation, adjustment, alterations, service, maintenance, or use can cause carbon monoxide poisoning, an explosion, fi re, electrical shock, or other conditions which may cause property damage, personal injury or loss of life. Consult a qualifi... - Page 5 Warnings (Con’t) Application of this humidifi er should have special attention given to vent sizing and material, gas input rate, and unit sizing. Improper installation or misapplication of the humidifi er can require excessive servicing or cause permanent component failure. The installation must conform to the requirements of the authority having jurisdiction, or in the absence of such requirements, to the National Fuel Gas Code, ANSI Z223.1 (latest edition).
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Page 6: Features
Features FEATURES 1. Tri-Probe Sensor 7. INTAC PLC Controller ® 2. 1/4”-NPT Water Inlet & Strainer 8. Support Legs 3. Over Temperature Cut-Out Switch 9. Burner Assembly 4. Flusher & Overfl ow Piping 10. Exhaust Connection 5. 3/4” Motorized Drain Valve 11. -
Page 7: Capacities, Electrical & Weights
Capacities, Electrical & Weights This humidifi er is a forced combustion type that can be used with natural gas or liquid propane. The burner can be easily removed to access the side entry exchanger(s) for cleaning. It is designed to work with low-pressure gas between 5” W.C. up to 14”... -
Page 8: Dimensions & Layout
Dimensions GX-3 & GX-4 Required Clearance: 8.0” “A” For recommended service and maintenance purposes (20.3) the following clearances should be maintained: Right side, see Top View for required clearance “B” Front side, NEC requires 36” clearance to control cabinet “E” Left side, 6”... -
Page 9: Dimensions & Layout
Dimensions GX-8 Required Clearance: 9.0” For recommended service and maintenance purposes (22.9) “A” the following clearances should be maintained: Right side, see Top View for required clearance Front side, NEC requires 36” clearance to control cabinet “B” Left side, 6” for access Rear, 6”... -
Page 10: Dimensions & Layout
Dimensions GX-12 Required Clearance: 9.0” “A” For recommended service and maintenance purposes (22.9) the following clearances should be maintained: Right side, see Top View for required clearance Front side, NEC requires 36” clearance to “B” control cabinet Left side, 6” for access “E”... -
Page 11: Installation & Location
Installation & Location Important: Remove all shipping brackets and materials Location of Controls before operating the humidi er. Humidi er ue gases must be vented to the outside atmosphere. Power It is important to avoid mounting any controls within the supply disconnect switch must be in the o position while visible steam. -
Page 12: Drain Pan Mounting
Drain Pan Mounting Drain Pan Mounting A drain pan is an additional safety feature which may be required to be supplied in the fi eld. In a proper humidifi er installation, a drain pan is not required. However, if the humidifi er and injection tube are located in an area that contains valuable equipment or is a water sensitive area, PURE Humidifi... -
Page 13: Electrical, Combustion & Ventilation Air
Electrical, Combustion & Ventilation Air Electrical Combustion & Ventilation Air WARNING: CAUTION: The cabinet must have an uninterrupted or unbroken Air for combustion must not be contaminated by halogen ground according to National Electrical Code, ANSI/NFPA compounds, which include fl uoride, chloride, bromide 70 and Canadian Electrical Code, CSA C22.1, or local codes and iodide. -
Page 14: Gas Piping Installation
Gas Piping Installation CAUTION: Purge air before lighting unit by disconnecting piping at gas Gas pressure to humidifi er controls must never exceed control. In no case should the line be purged into heat 14” W.C. (1/2 psi). exchanger. Contact your local gas service company to ensure that Install pressure regulator directly upstream of main automatic adequate gas service is available, and to review applicable gas valve(s) and fi... - Page 15 Gas valves outlet pressure (manifold) shall be factory set. This pressure can be checked at the 3/4” tee after the orifi ce. See humidifi er label for correct pressure rating. Table 1 - Gas Input CFH for GX Series Humidifi ers Max BTU/hr...
- Page 16 Venting This humidifi er must not be connected to a chimney fl ue The GX Series Humidifi ers are a Category 3 Appliance. servicing a separate appliance designed to burn solid fuel. If condensation is noticed in the fi eld, a condensate trap The purpose of venting the gas humidifi...
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Page 17: Venting
Venting Installation (Con’t) No portion of the vent system shall extend into, or pass Venting Requirements through, any circulation air duct or plenum. 100’ maximum equivalent length of vent pipe. 90° Elbow = 10’ The vent system shall terminate above the roof surface 45°... - Page 18 Venting Installation (Con’t) Rigidly support the vent pipe every 5 feet or less with must be maintained. hangers or straps to ensure that there will be no movement or sagging after installation. The humidifi er vent box should Venting Requirements not be supporting the weight of the vent piping.
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Page 19: Sealed Combustion
Sealed Combustion Sealed Combustion Air Kit Consists of a 6” round stainless steel adaptor to connect to fi eld installed combustion air piping. Use of this kit will allow the burner to intake combustion air from outside instead of using room air. When using sealed combustion with multiple burners use separate exhaust pipes or separate makeup air pipes so exhaust gas does not recirculate if one blower malfunctions. -
Page 20: Gx-8 Exhaust Manifold
GX-8 Exhaust Manifold Reference pages 8 & 9 for venting installaton instructions Typical GX-8 Increaser by others Heat-fab p/n 9374 Humidifi er Adaptor by others Heat-fab p/n 9301AMTK 6ӯ Manifold by others Conduit Tee by others Heat-fab p/n 9616X4 Tee Cover w/ Drain Fitting by others Heat-fab p/n... -
Page 21: Gx-12 Exhaust Manifold
GX-12 Exhaust Manifold Reference pages 8 & 9 for venting installaton instructions Increaser by others Typical GX-12 Heat-fab p/n 9374 Humidifi er Adaptor by others Heat-fab p/n 9301AMTK 8ӯ Manifold by others Conduit Tee by others Heat-fab p/n 9816X4PUR Tee Cover w/ Drain Fitting by others Heat-fab p/n... -
Page 22: Water Supply & Drain Piping
Water Supply & Drain Piping Water Supply Piping Drain Piping This style of humidifi er utilizes a Tri-Probe conductive The GX style humidifi er requires one 3/4” SW copper drain type water control system which is designed for use with piping connection. -
Page 23: Supply Piping Examples
Steam Supply Piping Examples Pitch Use two 45° elbows for (see Note 1) hard piping or wide 90° for exible steam hose ¹ ”/1’ 2”/1’ see Note 2 Supply piping see Note 2 connectors (see Note 4) Pitched Towards Steam Generator Pitched Towards Tube Assembly Drain Tee (see Note 7) -
Page 24: Modulating Control Operation
Modulating Control Operation Overview The INTAC® PLC controls the humidifi er tank functions and up to 3 gas burners. The PLC also provides standard a BACnet MS/TP or IP interface. Inputs: 1 or 2 humidity sensors or a control signal and a humidity signal water level sensing tank mounted ntc thermistor reset button 1, reset button 2, and reset button 3... - Page 25 Modulating Control Operation (Con’t) Gas System Sequence 1. When humidifi er % power is greater than or equal to Burner #1 on, all combustion blower outputs and the burner #1 control power enable output will turn on. 2. If confi gured for at least a two-burner system, when % power is greater than or equal to Burner #2 on, the burner #2 control power enable output will turn on.
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Page 26: Gx Pre-Startup Checklist
GX Pre-Startup Procedure Pre-Startup Checklist _____ 8. PIPING: Steam Outlet - Refer to Supply Piping Examples page for proper outlet steam piping from the Before starting the GX PURE Humidifi er Co. Steam Heat generator to the tube(s). Any horizontal to vertical up Exchanger Humidifi... -
Page 27: Gx Startup Procedure
GX Startup Procedure Introduction _____ 10. Check operation of fi eld installed safety switches (air fl ow proving switch and the high-limit humidistat) to make The burner should be initially set up and serviced at sure they turn the power off to the control relay which is the regular intervals (preferably at the beginning of and mid- control circuit power. -
Page 28: Gx Burner Startup Procedure
The following procedure may be used by qualifi ed service _____ 1. The air damper will be fully open if the burner is personnel to start the GX series gas humidifi er. It is assumed to be fi red at the maximum rate. Otherwise, depending upon... - Page 29 GX Burner Startup Procedure (Con’t) _____ 11. If the unit has a modulating burner, proceed to the “For Modulating Burners” section. For Modulating Burners Burners set up for modulation are turned in the factory. However, due to the diff erent conditions that occur with each particular installation, slight adjustments may have to be made with the gas/air linkage.
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Page 30: Troubleshooting
GX Troubleshooting Problem Possible Cause Recommended Action Humidifi er will not heat Blown control fuse Check and replace. Control transformer not producing 24 Check transformer output. vac control voltage Verify voltage across 24VAC Fused and 24VAC Com terminals Safety controls open Verify that all safety circuit control (airfl... -
Page 31: Burner Troubleshooting & Maintenance
Burner Troubleshooting & Maintenance Service/Maintenance Suggestions The burner should be initially set up and serviced at regular intervals (preferably at the beginning of and mid-way through high use period) by a trained serviceman using the proper test instruments. There is a red reset button/main gas light on the front of the humidifi er control panel for each burner. Depressing the button will restart that particular burner’s operation. -
Page 32: Burner Flame Controller Troubleshooting
Burner Flame Controller Troubleshooting Guide Before troubleshooting, familiarize yourself with the startup and checkout procedures. Turn gas supply off. Turn thermostat (controller) to “Call for Heat”. Make sure burner is enabled by main control panel. Check line voltage power. Low voltage transformer, Power to module? limit controller, thermostat (controller), and wiring. -
Page 33: Tool Requirements And Torque List
Tool Requirements & Torque List Recommended Maintenance Tool List 7/16” Wrench 3/4” Wrench Crescent Wrench 11/32” Nut Driver or Socket 3/8” Nut Driver or Socket 5/32” Allen Head Flat Head Screw Driver Wire Stripper Wire Crimper Torque List Cover Bolts 18 inch/pounds MAX Side Entry Exchanger Bolts 80 inch/pounds MAX... -
Page 34: Gx Maintenance
PURE Humidifi er Co. GX Maintenance Instructions The GX Series Humidifi er is designed to provide the best possible operation with minimum maintenance. However, the humidifi er should be inspected and placed on a dedicated maintenance schedule to ensure continued operation of the humidifi... -
Page 35: Exchanger Gasket Replacement
Exchanger Gasket Replacement Instructions WARNING Disconnect the humidifi er power, gas, exhaust system and allow the humidifi er to cool prior to servicing. Drain water level below the level of the exchanger being serviced. Heat exchangers have a top and bottom. There is a break (crease) on the bottom side of the heat exchanger. -
Page 36: Cover Gasket Replacement Instructions
Cover Gasket Replacement Instructions Remove the reservoir cover. While looking at the top of the unit, reference Figure A and B to determine which humidi er tank style you have. Figure A Installation Fit the gasket around the entire lip of the tank opening. Cut the gasket ¹ ” longer than required, this will ensure proper t when the cover is clamped back on. -
Page 37: Maintenance Notes
Maintenance Notes Maintenance Performed Date... - Page 38 Maintenance Notes Maintenance Performed Date...
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Page 39: Gx-4 Exploded Parts Drawing
Exploded Parts Drawing GX-3 & GX-4... -
Page 40: Gx-4 Parts List
PURE Humidifi er Co. GX-3 & GX-4 Parts List & Two Year Recommended Spare Parts Qty Per Unit t a l " 4 " 2 " 4 Cover Clamp Screw (10-24 x 1" Hex Socket) 15522 " 4 " 4 "... -
Page 41: Exploded Parts Drawing
Exploded Parts Drawing GX-8... -
Page 42: Parts List
PURE Humidifi er Co. GX-8 Parts List & Two Year Recommended Spare Parts Qty Per Unit ) t f " 2 " 4 Cover Clamp Screw (10-24 x 1" Hex Socket) 15522 " 4 " 4 " 4 " 4 "... -
Page 43: Exploded Parts Drawing
Exploded Parts Drawing GX-12... -
Page 44: Parts List
PURE Humidifi er Co. GX-12 Parts List & Two Year Recommended Spare Parts Qty Per Unit ) t f " 2 " 4 Cover Clamp Screw (10-24 x 1" Hex Socket) 15522 " 4 " 4 " 4 " 4 "... -
Page 45: Modulating Burner Exploded View
Exploded Parts Drawing Modulating Burner... -
Page 46: Modulating Burner Gun Assembly Exploded View
Exploded Parts Drawing Modulating Burner Gun Assembly... -
Page 47: Modulating Burner Parts List
Modulating Burner Parts List Burner Item No. c t i l l u : y l Parts of On/Off Burner " 4 " 8 " 2 " 2 " 4 " 4 " 8 t t i 3/4" x 1/2" Black Iron Hex Reducer Bushing: 871450 06035 Honeywell Combination Gas Valve/Regulator: X01463 21036... -
Page 48: On/Off Burner Exploded View
Exploded Parts Drawing On/Off Burner... -
Page 49: On/Off Burner Gun Assembly Exploded View
Exploded Parts Drawing On/Off Burner Gun Assembly... -
Page 50: On/Off Burner Parts List
On/Off Burner Parts List Burner Item No. c t i Parts on Mod Burner : y l " 4 " 8 " 2 " 2 " 4 " 4 " 8 t t i 3/4" x 1/2" Black Iron Hex Reducer Bushing: 871450 06035 Honeywell Combination Gas Valve/Regulator: X01463 21036... -
Page 51: Warranty
The PURE Humidi er Co. Warranty PURE Humidi er Co. guarantees its products to be free from defects in material and workmanship for a period of one year from the date of shipment; provided the product is properly installed, serviced, and put into the service for which it was intended. - Page 52 DISCLAIMER Product Changes: Changes in products may be required from time to time due to the need for continuing improvement of products and due to factors beyond PURE Humidi er Co.’s control. PURE Humidi er Co. reserves the right to make reasonable changes in products, speci cations and performance of any kind without notice or liability.
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