44
IGC Board
IGC Board
C10337
Fig. 55
−
Unit Control Box/IGC Location
Gas Valve
All unit sizesare equipped with 2
−
stage gas valves. See
Fig. 56 for locations of adjustment screws and features.
PLASTIC ADJUST
SCREW (2)
REGULATOR SPRING (2)
(PROPANE - WHITE
NATURAL - SILVER)
LOW STAGE
GAS PRESSURE
REGULATOR
ADJUSTMENT
MANIFOLD
PRESSURE TAP
INLET
PRESSURE TAP
ON/OFF
SWITCH
REGULATOR
COVER SCREW (2)
NPT INLET
NPT OUTLET
C12066A
Fig. 56
−
Gas Valve
Adjusting Gas Valve Pressure Settings
IMPORTANT
: Leak check (using a mixture of soapy
water or leak detection fluid) all gas connections
including the main service connection, gas valve, gas
spuds, and manifold pipe plug. All leaks must be repaired
before firing the unit.
Check Unit Operation and Make Necessary
Adjustments
NOTE
: Gas supply pressure at the gas valve inlet must
be within specified ranges for the fuel type and unit size.
See Tables 8, 9, 10, and 11.
1. Shut off all electrical power supply to the unit and in-
stall a lockout tag.
2. Close the manual gas shutoff valve located on the gas
supply line.
3. Remove the manifold pressure tap plug from the man-
ifold and connect a pressure gauge or manometer. See
Fig. 54.
4. Turn on the electrical supply.
Summary of Contents for 48TC 17 Series
Page 39: ...39 C10818 Fig 45 RTU OPEN Control Module ...
Page 83: ...83 APPENDIX IV WIRING DIAGRAMS cont C12616 Fig 74 48TC D17 D28 Power Diagram 208 230 3 60 ...
Page 84: ...84 APPENDIX IV WIRING DIAGRAMS cont C12266 Fig 75 48TC D17 D28 Power Diagram 460 3 60 ...
Page 85: ...85 APPENDIX IV WIRING DIAGRAMS cont C12618 Fig 76 48TC D17 D28 Power Diagram 575 3 60 ...
Page 92: ...92 APPENDIX IV WIRING DIAGRAMS cont C13767 Fig 83 RTU OPEN Wiring Diagram ...
Page 93: ...93 APPENDIX IV WIRING DIAGRAMS cont C13768 Fig 84 RTU OPEN Wiring Diagram with Humidi MiZer ...