Summary of Contents for Hastings DIRECT GAS FIRED ELECTRIC STEAM
- Page 1 ISSB-1 August 2011 Installation and Service Instructions DIRECT GAS FIRED, ELECTRIC, STEAM AND HOT WATER NOTICE Read These Instructions before installation...
- Page 2 Project Name:________________________________________ Phone No.:__________________________________________ Location:____________________________________________ Installer:_____________________________________________ Phone No.:__________________________________________ Date Installed:________________________________________ FOR YOUR SAFETY If you smell gas: 1. Open windows. 2. Don’t touch electrical switches 3. Extinguish any open flame. 4. Immediately call your gas supplier. WARNING: Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death.
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Page 3: Table Of Contents
TABLE OF CONTENTS SECTION 1 – General Information – Installation and Service Instructions……………………………………………………………………... – Notice to Equipment Users…………………………………………………...…………………………... – Equipment Servicing and Shipping.,…………………………………………………………………….. – Specifications………………………………………………………………………………………………. SECTION 2 – Installation – Installation Procedures…..……………………………………………………………………………….. – Pre-Start Inspection……………………………………………………………………………………….. – Start-Up……………………………………………………………………………………………………... – Valve Adjustments ………………………………………………………………………………………… –... -
Page 4: Section 1 - General Information
C. EQUIPMENT SERVICING AND SHIPPING INFORMATION Periodic Service Periodic service on any piece of mechanical equipment is necessary for efficient operation. Hastings has a na- tionwide service organization available to make quick and dependable servicing of make-up air, return air, heat- ing, ventilation, or air handling type equipment. -
Page 5: D - Specifications
4. Inspection of Shipment Upon Arrival Shipments are made F.O.B. Hastings, Nebraska, by truck. The unit is securely strapped, tied, and blocked to prevent shipping damage. All shipments are checked by an inspector before they are accepted by the carrier. -
Page 6: E - Installation Procedures
SECTION 2 E. INSTALLATION PROCEDURE The following recommendations are not intended to supplant any requirements of federal, state, or local codes having jurisdiction. This equipment shall be installed and wired in accordance with regulations of the National board of Fire Underwriters, National Electric Code, and local governing bodies. In Canada, equipment should be installed in accordance with the applicable provincial regulations. - Page 7 If optional motorized dampers are used, connect electrical wires supplied (in factory furnished conduit) with unit to damper motor as shown on electrical wiring diagram. Adjust linkage so that damper will close when blower switch in remote control panel is in “off” position. For Series 14 or Series 44 selectra modulation with tempera- ture selector dial, which is shipped unmounted or mounted on remote panel, the wiring for the dial must be shielded cable or ran in separate conduit.
- Page 8 6. Units with a VUR-1 or HR-3 vertical – upblast discharge arrangement must have discharge ductwork sup- ported from building support members and not supported from the equipment. NO DISCHARGE DUCT- WORK IS TO BE SUPPORTED BY EQUIPMENT DISCHARGE OPENING CONNECTIONS. NOTE: On indoor units, intake hood and birdscreen and any appropriate ductwork must be full size of unit opening.
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Page 9: Pre-Start Inspection
Wire Size Maximum Wire Length in Feet 16 ………………………………………………..160 14 ………………………………………………. 245 12 ………………………………………………. 395 See Wiring diagram level referencing shielded cable for remote temperature dial connection. 10. Miscellaneous Installation Guidelines All sections not shipped attached must be assembled in the field by 1/4 – 20 x 5/8” sheet metal screws provided in the cloth bag with each ship along section. -
Page 10: Start-Up
Check to see if all gas connections are tight and that all joints have been properly lubricated. Check to see if all condensate drain piping has been completed (if required). Insure that all insulation is fastened securely to walls, ceiling, and floor areas. Check blower supply area to insure freedom of shaft rotation and proper belt tension - Remove any shipping blocks and isolation support frame securing bolts (if ordered). - Page 11 Wait five minutes. Push reset button on electronic relay. Push manual reset button on gas pressure switches, starters, and limit control if necessary. Check if limit control is locked at 180 deg. F. discharge temperature. Close main disconnect switch to turn power on. Standard units are operated from the toggle switches in the remote control panel.
- Page 12 2. Remove seal cap (A) and turn regulator pressure adjusting screw to obtain desired manifold pres- sure. (Clockwise rotation increases pressure) - see page 11. 3. Reconnect the wires to terminal #4. b. MR212 valve low fire or by-pass adjustment. 1.
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Page 13: Valve Adjustments
H. VALVE ADJUSTMENTS -11-... -
Page 14: Sequence Of Operation
I. SEQUENCE OF OPERATION 1. Typical sequence of operation – direct gas fired units: Closing fused disconnect switch supplies 115 volt power to control circuit through 115 volt control transformer. Unit is ready for operation. Summer Operation If three position season switch is in the “summer” position and two position blower switch is “on“, power is supplied to the two position fresh air/discharge air damper motor. -
Page 15: Miscellaneous Maintenance
Winter Operation If the entering air temperature is below the entering air controller setpoint and the blower is operating, the heating coil valve is energized and powered open, and the heat “on” light is energized on the remote control panel. Discharge air temperature is controlled by discharge air controller. - Page 16 MOTOR ADJUSTING BOLT AND BELT TENSION - FOR BELT “DEFLECTION” TABLE BELOW. DEFLECTION TABLE Deflection Force Belt Cross Section Motor Pulley Pitch Diameter (marked on belt) Minimum Maximum 3.0” – 3.6” 2.62 lbs. 3.25 lbs. 3.8” – 4..8” 3 lbs. 4 lbs.
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Page 17: Installation Of Roof Curbs
K. INSTALLATION OF ROOF CURBS Units can be supplied with an optional roof curb. The curb greatly facilitates installation thereby reducing installation costs. All connections to the unit ductwork, piping, and electrical power and control wiring can be made through the roof opening. - Page 18 b. Blower light in remote panel will not function until all air proving safety controls are operational. NOTE: Units that have SP-L and AP-H air proving switches are factory set and not to be tampered with. AP-L is set to .25” w.c., AP-H is set to 1.0” w.c. 3.
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Page 19: M - Trouble Shooting The Electric Unit
9. If burner flame is not consistent across the entire burner length and darker areas are noticed, burner orifice openings are blocked and require cleaning - contact factory for orifice drill size. M. TROUBLE SHOOTING THE ELECTRIC SB UNIT 1. If blower fails to operate, check to see if: a. -
Page 20: N - Trouble Shooting The Steam Or Hot Water Unit
If unit does not heat air, check to see if: a. Modulating step controller is operating through all heating steps. b. Sub-circuit heating element fuses in circuit. c. All magnetic heating element contactors are operational d. Heat limiters are n.c. and in the electrical circuit. NOTE: Electric heating SBE units may not be furnished with a disconnect switch or circuit breaker. - Page 21 Most of the common causes of trouble have been covered and one or more remedies suggested to correct the malfunc- tion, but if SB unit still fails to operate properly, notify the nearest Hastings service representative. - 19 -...
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- Page 36 3606 Yost Avenue · Hastings, Nebraska 68901-1966 Phone (402) 463-9821 · Fax (402) 462-8006 www.hastingshvac.com E-mail: sales@hastingshvac.com...
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