Calibration Procedures - Cambridge Engineering S Series Technical Manual

g. Replace and fasten all covers and panels. Close the
control enclosure and latch the door.
h. Turn the disconnect switch to the "ON" position.
IMPORTANT
If technical assistance is needed, call the Cambridge
Customer Service Group at 1-800-473-4569 during
the hours of 8:00 a.m. to 5:00 p.m. Central Time,
Monday through Friday.
12. REMOTE CONTROL STATION CHECK
a. On EDSM and EDSM/TP control systems, if the
ambient temperature is at or above the Entering
Air Thermostat (EAT) set point the EAT must be
adjusted in the heater. Note the set point position
and pull the jumper off the temperature set point
(EAT Enabled Mode) and reinstall it sideways
on the terminal block (Bypass Mode) as shown
in Figure 1. Refer to the Individual Component
Description section for additional information.
b. Insert key
switch and urn the mode selector switch to the
"HEATING" position.
c. Set the operating thermostat, if applicable, to its
highest setting or activate that part of the control
system which will initiate blower and burner opera-
tion.
For Remote Control Station - Security (RCS-S),
refer to the Operating Instructions for the Operating
Electronic Thermostat (OET) (page 33).
For Temperature Setback System (TSS), refer to
the Operating and Programming Instructions for the
TSS Controller (page 35).
I f another interlock device controls the operation of
the heater, activate this device.
d. After the motorized discharge damper opens, the
blower motor will start.
e. After a delay for pre-purge and igniter warmup, the
burner will ignite.
S-Series Technical Manual
Figure 1
f. Adjust the temperature control system and verify
the heater output changes correspondingly.
For EDSM, adjust the Space Temperature Selector.
For EDR, adjust the Remote Heat Adjust.
g. Reset the operating thermostat, if applicable, and
the temperature control system, if applicable, to the
desired temperature. If the Entering Air Thermostat
was adjusted, reset to its previous setting.
h. Turn the mode selector switch to the "SUMMER
VENTILATION" position. Verify the blower oper-
ates. In TSS applications, the override timer may
need to be activated to initiate operation.
i. Turn the mode selector switch to the desired operat-
ing mode.

CALIBRATION PROCEDURES

EDL CONTROL SYSTEMS
(MAXITROL SERIES 14)
1. Turn the burner service switch to the "OFF" posi-
tion and allow the Discharge Air Temperature
Sampling Box time to cool.
2. Turn the blower service switch to the "OFF" posi-
tion.
3. Open the unit access door on the control enclosure
side.
4. Remove the access cover from the Discharge Air
Temperature Sampling Box and remove the two
mounting screws from the discharge temperature
sensor DTS. Refer to the Individual Component
Description Section (pages 67-72) for additional
information.
5. Carefully remove the DTS from the sampling
box, turn it over and adjust the DTS calibration
potentiometer shown in the drawing. To raise the
discharge temperature, adjust the potentiometer 90˚
counterclockwise.
29 Cambridge Engineering, Inc.