Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS R- -410A Single- -Package Rooftop Gas Heating / Electric Cooling RGS036- -072 NOTE: Read the entire instruction manual before starting the installation TABLE OF CONTENTS SAFETY CONSIDERATIONS ....Step 10 - - Install Gas Piping .
Page 2: Safety Considerations
SAFETY CONSIDERATIONS WARNING Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical ELECTRICAL SHOCK HAZARD shock or other conditions which may cause personal Failure to follow this warning could cause personal injury or property damage. Consult a qualified installer, injury or death.
Page 3: Rated Indoor Airflow (Cfm)
Rated Indoor Airflow (cfm) Model Number Full Load Airflow (cfm) RGS036 1275 The table to the right lists the rated indoor airflow used RGS048 1400 for the AHRI efficiency rating for the units covered in this RGS060 1800 document. RGS072 2200 MODEL NOMENCLATURE MODEL SERIES...
Page 4 C150164 Fig. 1 - - Unit Dimensional Drawing 509 01 3522 00 Specifications are subject to change without notice.
Page 5 C150165 Fig. 1 - - Unit Dimensional Drawing (cont.) 509 01 3522 00 Specifications are subject to change without notice.
Page 6: Installation
C08337 LOCATION DIMENSION CONDITION 48--- in (1219 mm) Unit disconnect is mounted on panel 18--- in (457 mm) No disconnect, convenience outlet option 18--- in (457) mm Recommended service clearance 12--- in (305 mm) Minimum clearance 42--- in (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) 36--- in (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass)
Page 7: Roof Mount
Locate mechanical draft system flue assembly at least 4 ft Rig and place unit (1.2 m) from any opening through which combustion Install outdoor air hood products could enter the building, and at least 4 ft (1.2 m) Install flue hood from any adjacent building (or per local code).
Page 8: Step 4 - Provide Unit Support
Step 4 — Provide Unit Support Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and Roof Curb Mount — not to the unit. The accessory thru- - the- - base power and Accessory roof curb details and dimensions are shown in gas connection package must be installed before the unit Fig.
Page 9 C13310 Fig. 4 - - Roof Curb Details 509 01 3522 00 Specifications are subject to change without notice.
Page 10: Step 5 - Field Fabricate Ductwork
Step 5 — Field Fabricate Ductwork Step 6 — Rig and Place Unit Cabinet return-air static pressure (a negative condition) Keep unit upright and do not drop. Spreader bars are shall not exceed 0.35 in. wg (87 Pa) with economizer or required.
Page 11: Positioning On Curb
Positioning on Curb — Do not cover or obscure visibility to the unit’s informative data plate when insulating horizontal ductwork. Position unit on roof curb so that the following clearances are maintained: in. (6.4 mm) clearance between the Step 8 — Install Outside Air Hood roof curb and the base rail inside the front and rear, 0.0 in.
Page 12: Economizer Hood And Two- - Position Hood
4. Carefully lift the hood assembly (with metal tray) each hood side. The hood divider is also used as the through the filter access opening and assemble per the bottom filter rack for the aluminum filter. steps outlined in Economizer Hood and Two–Position 5.
Page 13: Factory- - Option Thru- - Base Connections (Gas Connections)
may be field converted for operation at elevations above Install a gas supply line that runs to the unit heating 2000 ft (610 m) and/or for use with liquefied petroleum section. Refer to the NFPA 54/NFGC or equivalent code fuel. See accessory kit installation instructions regarding for gas pipe sizing data.
Page 14 The thru- - base gas connector has male and female threads. The male threads protrude above the basepan of the unit; the female threads protrude below the basepan. 9” (229mm) min Check tightness of connector lock nuts before connecting gas piping. Install a - - in NPT street elbow on the thru- - base gas Thru-Curb Adapter...
Page 15: Step 11 - Install External Condensate Trap And Line
When installing the gas supply line, observe local codes pertaining to gas pipe installations. Refer to the NFPA 54/ANSI Z223.1 NFGC latest edition (in Canada, CAN/CSA B149.1). In the absence of local building codes, adhere to the following pertinent recommendations: 1.
Page 16: Step 12 - Make Electrical Connections
Units Without Disconnect Option 1-ph Belt Drive IFM MINIMUM PITCH (575-V only) 1” (25mm) PER BASE RAIL 10’ (3m) OF LINE 1-ph Belt Drive IFM (230 & 460-V) 2˝ (51) MIN OPEN Direct Drive IFM VENT (575-V only) TO ROOF SEE NOTE DRAIN Disconnect...
Page 17: Units Without Factory- - Installed
C12278 Fig. 24 - - Location of Non- - Fused Disconnect Enclosure C12279 Fig. 25 - - Handle and Shaft Assembly for NFD To field install the NFD shaft and handle: 1. Remove the unit front pane (see Fig. 1). Units Without Factory- - Installed Non- - Fused Disconnect —...
Page 18: Convenience Outlets
Convenience Outlets — Mount the weatherproof cover to the backing plate as shown in Fig. 27. Remove two slot fillers in the bottom of WARNING the cover to permit service tool cords to exit the cover. Check for full closing and latching. ELECTRICAL OPERATION HAZARD COVER –...
Page 19: Field Control Wiring
be balanced within 2% and the current within 10%. Use Typical Central the formula shown in the legend for Table 6, Note 2 to Thermostat Terminal determine the percent of voltage imbalance. Operation on Connections Board improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components.
Page 20: Hot Gas Re- -Heat Control Connections
C14225 Fig. 30 - - EconoMi$er X W7220 Controller Wiring Diagram Hot Gas Re- -Heat Control Connections Hot Gas Re- - Heat - - Space RH Controller — NOTE: Hot Gas Re- - Heat is a factory installed option which is available for 072 models only. The Hot Gas Re- - Heat dehumidification system requires a field- - supplied and - - installed space relative humidity control device.
Page 21 C150150 Fig. 32 - - Humidistat Wiring - - RGS072 with Hot Gas Re- - Heat Dehumidification System THERMIDISTAT Unit CTB THERMOSTAT O/W2/B SRTN Hot Gas Re-Heat FIOP *Connection not required. C09298I Fig. 33 - - Thermostat Device Connections for RGS072 with Hot Gas Re- - Heat Dehumidification System 509 01 3522 00 Specifications are subject to change without notice.
Page 22: Smoke Detectors
Smoke Detectors Smoke detectors are available as factory- - installed options on RGS models. Smoke detectors may be specified for Supply Air only without or with economizer. All components necessary for operation are factory- - provided and mounted. The unit is factory- - configured for immediate smoke detector shutdown operation;...
Page 23 Table 6 – Unit Wire/Fuse or HACR Breaker Sizing Data NO C.O. or UNPWR C.O. NO P .E. w/ P .E. (pwrd fr/ unit) UNIT NOM.V--Ph--Hz TYPE MAX FUSE MAX FUSE DISC. SIZE DISC. SIZE or HACR or HACR BRKR BRKR 208/230--- 1--- 60 DD--- STD...
Page 24 Table 6 - - Unit Wire/Fuse or HACR Breaker Sizing Data (cont.) NO C.O. or UNPWR C.O. NO P .E. w/ P .E. (pwrd fr/ unit) UNIT NOM.V--Ph--Hz TYPE MAX FUSE DISC. SIZE MAX FUSE DISC. SIZE or HACR or HACR BRKR BRKR 33/33...
Page 25: Step 13 - Adjust Factory- -Installed Options
C09302 Fig. 34 - - EconoMi$er IV Wiring Step 13 — Adjust Factory- -Installed Options Step 14 — Install Accessories Smoke Detectors — Available accessories include: Curb Smoke detector(s) will be connected at the Controls Thru- - base connection kit (must be installed before unit Connections Board, terminals marked “Smoke...
Page 26 Copyright 2015 International Comfort Products Replaces: 509 01 3502 00 Lewisburg, TN 37091 USA 509 01 3522 00 Specifications are subject to change without notice.
Page 27: Start- - Up Checklist
UNIT START-UP CHECKLIST (Remove and Store in Job File) MODEL NO.: SERIAL NO.: I. PRE-START-UP j VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT j VERIFY INSTALLATION OF OUTDOOR AIR HOOD j VERIFY INSTALLATION OF FLUE EXHAUST AND INLET HOOD j VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS j VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT j VERIFY GAS PRESSURE TO UNIT GAS VALVE IS WITHIN SPECIFIED RANGE...
Page 28 9. OPEN HUMIDISTAT INPUT COMPRESSOR AND OUTDOOR FAN STOP; LSV AND DSV SOLENOIDS DE- - ENERGIZED j 10. RESTORE SETPOINTS FOR THERMOSTAT AND HUMIDISTAT Copyright 2015 International Comfort Products Replaces: 509 01 3502 00 Lewisburg, TN 37091 USA 509 01 3522 00...

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