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Notice, Warning – Burnham SCG 1100-H4 User Manual

Page 46

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4

How to Wire

Ensure power is turned off to boiler.

Locate the LWCO jumper wire in the factory wiring

harness. Remove the jumper wire and install

the LWCO wiring from LWCO Model 1100-H4

(P/N 100592-01) into the plug of the SCG factory

wiring.

How to Test

Shut off fuel supply. Lower water level until water

level is BELOW the LWCO. Generate a boiler demand

by turning up thermostat. Boiler should not attempt to

operate. Increase the water level by filling the system.

The boiler should attempt to operate once the water

level is above the LWCO.

NOTICE

Ensure the location of the lWCO in the piping will

allow for connection of the lWCO wiring harness

to the factory wiring of the SCG.

C.

Connect system supply and return piping to boiler.

See Figures 25 and 26. Maintain minimum ½ inch

clearance from hot water piping to combustible

materials.

NOTICE

Burnham recommends sizing the system

circulator to supply sufficient flow (GPM) to allow a

0°F temperature differential in the system. When

sizing the system circulator, the pressure drop of

all radiators, baseboard and radiant tubing and all

connecting piping must be considered.

D.

Install circulator with flanges, gaskets and bolts

provided. Circulator harness allows circulator to be

mounted on supply or return. Connect harness to

circulator and secure any excess conduit.

E.

Install supply manifold, pressure/temperature gauge

and pressure relief valve.

See Figure 24. Pressure Relief Valve must be installed

with spindle in vertical position. Installation of the

relief valve must comply with the ASME Boiler and

Pressure Vessel Code, Section IV.

Figure : Recommended Piping for Combination

heating & Cooling (Refrigeration) System

WARNING

Pressure relief valve discharge piping must be

piped such that the potential of severe burns

is eliminated. DO NOT pipe in any area where

freezing could occur. DO NOT install any shut-off

valves, plugs or caps. Consult local Codes for

proper discharge piping arrangement.

F.

Space heating and domestic water heating with

Alliance™ water heater. Install Alliance water heater as

a separate heating zone. Refer to Alliance Installation,

Operating and Service Instructions for additional

information.

G.

If boiler is used in connection with refrigeration

systems, boiler must be installed with chilled medium

piped in parallel with the heating boiler using

appropriate valves to prevent chilled medium from

entering boiler, see Figure 23.

H.

If boiler is connected to heating coils located in

air handling units where they may be exposed to

refrigerated air, boiler piping must be equipped with

flow control valves to prevent gravity circulation of

boiler water during operation of cooling system.

I.

Use a boiler bypass if the boiler is to be operated

in a system which has a large volume or excessive

radiation where low boiler water temperatures may be

encountered (i.e. converted gravity circulation system,

etc.).