Weil-McLain Gold CGa CGa

GOLD CGa Gas-Fired Water Boiler

34 Part Number 550-110-593/1099

Operation — standing pilot boilers8a

Figure 23 Wiring diagram — Standing pilot system

4

2

536

1

CIRCULATOR

120 V.A.C.

HN

CR2

SERVICE SWITCH

(BY OTHERS)

EQUIPMENT

GROUND

THERMOSTAT

OR EMCS

(NOTE 5) RELAY COIL

CR

CABLE

TO

DAMPER

DAMPER

CONNECTOR

CR1

SPILL

SWITCH

ROLLOUT

TFE

ADDITIONAL

LIMITS

(NOTE 6)

GAS

VALVE

FUSE

PILOT

BL

BL

G

BK

BK

BK

BK

THERMOSTAT

OR EMCS

(NOTE 5)

SPILL

SWITCH

ROLLOUT

TFE

LIMIT

CONNECTOR

DAMPER

DAMPER

TO

CABLE

THERMO-

Y

W

LADDER WIRING DIAGRAM

SCHEMATIC WIRING DIAGRAM

PART NUMBERWeil-McLain500 Blaine St.Michigan City, IN 46360-2388

A United Dominion Company

550-225-009/0999R CGY

63

1524

24 V.A.C.PRIMARY

BK BK

Y

Y

CONTROL

LIMIT

CONTROL

25 thru 8

CGaForced Hot WaterNatural Or Propane GasStanding Pilot

(NOTE 7)

(NOTE 6)

LIMITS

ADDITIONAL

LOW VOLTAGE FIELD

HIGH VOLTAGE FIELD

LOW VOLTAGE FACTORY

HIGH VOLTAGE FACTORY

THERMOCOUPLE

4. REFER TO CONTROL COMPONENT INSTRUCTIONS PACKED WITH BOILER FOR APPLICATION INFORMATION.

5. THERMOSTAT - FOR SINGLE ZONE SYSTEMS, THERMOSTAT ANTICIPATOR SETTING IS 0.40 AMPS.

EMCS - FOR EMCS CONNECTION IN PLACE OF THERMOSTAT, REFER TO

6. L.W.C.O., ADDITIONAL HIGH LIMIT, ETC., WIRED IN SERIES.

7. DENOTES FIELD INSTALLED CHASSIS GROUND.

2. ALL CONTACTS SHOWN WITHOUT POWER APPLIED-OFF SHELF CONDITION.

1. ALL WIRING MUST BE INSTALLED IN ACCORDANCE WITH:

A. U.S.A. - NATIONAL ELECTRICAL CODE AND ANY OTHER NATIONAL, STATE OR LOCAL

B. CANADA - C.S.A. C22.1 CANADIAN ELECTRICAL CODE PART 1 AND ANY OTHER

3. IF ORIGINAL ROLLOUT TFE WIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED,

TYPE 200 C WIRE OR ITS EQUIVALENT MUST BE USED. IF OTHER ORIGINAL WIRE AS

SUPPLIED WITH THE APPLIANCE MUST BE REPLACED, TYPE 105 C OR ITS EQUIVALENT MUST

o

NOTES:

BE USED.

CODE REQUIREMENTS.

FOR MULTIPLE ZONE SYSTEMS USING ZONE VALVES OR CIRCULATORS, REFER

TO COMPONENT MANUFACTURER’S INSTRUCTIONS FOR

APPLICATION WIRING AND THERMOSTAT ANTICIPATOR SETTING.

EMCS INSTALLATION/OPERATING MANUAL.

NATIONAL, PROVINCIAL OR LOCAL CODE REQUIREMENTS.

COUPLE

o

W

R

TRANSFORMER

120/24 V.A.C.

JUNCTION BOX

CIRCULATOR

N

WIRE NUT

W

Y

EQUIPMENT

GROUND

SWITCH

SERVICE

(BY OTHERS)

H

BK

BK

G

C

G

Y

RELAY

DPST

PLUG-IN

(NOTE 7)

ELECTRICAL SHOCK HAZARD, CAN CAUSE SEVEREINJURY OR DEATH. DISCONNECT POWERBEFORE INSTALLING AND/OR SERVICING.

Contents

Main Please read before proceeding When servicing boiler Boiler operation Boiler water Installer Page How it works . . . Other boiler components: Boiler circulator Contents Hazard definitions Prepare boiler location codes & checklist 1a Installations must follow these codes: Before locating the boiler, check the following: Prepare boiler location clearances1b Service clearances Flooring and foundation Residential garage installation Small space installations Prepare boiler location vent system1c When removing boiler from existing common vent system: Chimney or vent requirements Prepare boiler location air contamination 1d Air from inside building Prepare boiler location air openings1c Special considerations Tight construction Prepare boiler placement and setup 2a Inspect orifices and burners Place boiler/crate near position Orifice replacement procedure 2b Prepare boiler pressure test Perform hydrostatic pressure test Page Prepare boiler vent damper installation Water piping general information3a General piping information Relief valve System water piping Pressure/temperature gauge 3b Water piping multiple zones Typical piping multiple-zone installations 3d Primary/secondary (preferred) bypass piping method Temperature gauges Primary/secondary (preferred) piping for radiant heating or converted gravity systems 3e Temperature gauges Boiler-bypass piping method Boiler-bypass (alternate) piping for radiant heating or converted gravity systems 3f System-bypass piping method System-bypass piping for converted gravity (or steam) systems 9 3g Gas piping Field wiring Electrical installation must comply with: Wiring connections Start-up preparation6a Determine if water treatment is needed Check for gas leaks Fill the system with water Inspect system water piping Start-up operate boiler6b Start-up preparation continued6a Inspect base insulation Start the boiler Start-up if boiler doesnt start . . .6c Check for: Start-up operate boiler continued6b Check system and boiler Start-up Check-out procedure checklist7 Installation and service certificate 34 Operation Standing Pilot CGa Lighting instructions CGa-25 to CGa-88b FOR YOUR SAFETY READ BEFORE LIGHTING LIGHTING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE LIGHTING LIGHTING INSTRUCTIONS Lighting instructions CGa-25 to CGa-88b Natural gas Standing pilot Gas valve manufacturer Robertshaw Gas valve model(s) 7200 Figure 24 Ignition control module sequence of operation status light indications Operation Figure 25b Ladder wiring diagram Spark-ignited pilot system MV FLAME LIMIT DAMPER Legend for ladder wiring diagram Page Operating instructions CGa-25 to CGa-69b Natural gas Spark pilot Gas valve manufacturer Robertshaw Gas valve model(s) 7200 Page Page 44 Service and maintenance Table 6 Service and maintenance schedules (service technician and user) ANNNUAL START-UP Service technician Owner maintenance Service & maintenance annual start-up10b Reported problems Boiler area Air openings Flue gas vent system Service & maint. annual start-up continued10b Oiled-bearing circulators Boiler heating surfaces Burners and base Gas piping Service & maint. annual start-up continued10b Before troubleshooting: Troubleshooting procedure11a Page Chart 1 Standing pilot Boiler will not fire Troubleshooting standing pilot boilers11b Control indicator lights non-lockout modes Troubleshooting the control module Control indicator lights lockout modes Part Number 550-110-593/1099 53 Figure 30 Control module connections DAMPER LIMIT TSTAT CIRC Indicator lights Chart 2 Spark-ignited pilot Troubleshooting POWER light status Is POWER light... Chart 3 Spark-ignited pilot TSTAT CIRC & POWER lights flashing Did you find a voltage across the two external thermostat circuit wires? and Do the lights still flash? Chart 4 Spark-ignited pilot DAMPERlight flashing Chart 5 Spark-ignited pilot FLAME & POWER lights flashing Is pilot burning? Do Are lights flashing? Is gas present at gas valve inlet and within above range? Figure 30, item 8, page 53 Does light flash now? Is 24 VAC present there? Is gas present at gas valve inlet and within above range? Chart 7 Spark-ignited pilot Insufficient heat or no heat (POWERlight on steady) Is thermostat circuit closed (continuity across wires)? Is vent or combustion air piping free of blockage? Are limit switch contacts closed? Figure 30, Item 7, page 53 Replacement parts12a Page Page Page Page Page 66 Dimensions13a Figure 36 Dimensional drawing ALL DIMENSIONS IN INCHES Ratings13b 1 Table 7 Ignition system model suffixes Notes DOE