beautypg.com

Burnham ALP150 User Manual

Page 55

background image

55

Figure 8: Wiring for MCBa Modulating Boiler Control Time Delay Relay Box

5. If the boiler installation site may be subject to low

supply voltage conditions or “brownouts”, that
would affect MCBA Modulating Boiler Control

operation, a separate optional Time Delay Relay
Box (P/N 101693-01) installation is strongly
recommended. See Figure 38 “Wiring for MCBA

Modulating Boiler Control Time Delay Relay Box”
and follow the following installation steps:

a. Turn off power to boiler.

b. Remove 120 volt power wiring, L1, L2 and

ground.

c. Remove cover to MCBA Time Delay Relay Box.
d. Mount MCBA Time Delay Relay Box on secure

surface near boiler.

e. Connect wiring to MCBA Time Delay Relay Box

as per wiring diagram (Figure 38).

f. Connect additional field wiring (not included

in the kit) from MCBA Time Delay Relay Box
to 120 volt power wiring as per wiring diagram
(Figure 38).

g. Install cover on MCBA Time Delay Relay Box

and restore power to boiler.

h. Measure time from when power is restored until

the boiler actually powers up (LED numbers
will reappear on MCBA display panel). This

MCBA Time Delay Relay Box has a delay on
make timer that delays powering of the boiler for
3 minutes whenever power is lost to the boiler.
Timing should be approximately 3 minutes, but
no longer than 4 minutes.

i. Cycle boiler per installation manual.

This manual is related to the following products: