Cambridge Engineering, Inc.
34
M-Series Technical Manual
c.3. If the make-up air heater is not equipped
with a Remote Control Station, activate
that part of the control system which will
initiate the blower and burner operation.
d. After a short delay for damper operation,
the blower should operate, followed by
burner ignition after a delay for prepurge
and igniter warm-up.
e. Adjust the applicable temperature control
and verify the heater output changes.
f. Reset the thermostat, if applicable, and the
temperature control to the desired tempera-
ture.
g. Turn the mode selector switch to the
“SUMMER VENTILATION” position.
Verify the blower operates.
13. FINAL HEATER PREPARATION
a. Turn the disconnect switch off.
b. Set the Entering Air Thermostat (EAT) to
the specified temperature setting. Refer
to the Individual Component Description
Section for additional information.
c. Remove the jumper wire from the high
limit, if one was used. Reset the high
limit.
d. For the Maxitrol Series 44 control system,
set the
“
MIN
”
and
“
MAX
”
setting of the
amplifier to the application specifications.
e. Verify the blower and burner service
switches are in the
“
REMOTE
”
position.
f. Return the Technical Manual and Wiring
Diagram to the manual holder.
g. Perform a visual inspection of all wiring and
gas valve plugs to ensure they have been
properly replaced.
h. Replace and fasten all covers and panels.
Turn the disconnect switch on.
14. FINAL REMOTE CONTROL STATION
CHECK
a. To ensure the heater’s disconnect and service
switches have been left in the correct posi-
tion, turn the mode selection switch to the
“SUMMER VENTILATION” position and
verify the blower operates.
SHUT-DOWN INSTRUCTIONS
1. Turn the mode selector switch of the
Remote Control Station to the “OFF”
position.
2. Turn the service disconnect switch off.
3. Turn the blower and burner service
switches to the “OFF” position.
4. Close the supply gas cock.
5. Turn off the electric supply to the heater.
IMPORTANT
If you need technical assistance, call the Cambridge
Engineering Customer Service Group at 800-473-4569
during the hours of 8:00 a.m. to 5:00 p.m. Central
Time, Monday through Friday.
