Cambridge Air Solutions S Series, Техническое руководство

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S-Series Technical Manual 61 Cambridge Air Solutions
13. Close the electrical enclosure door and tighten the
latches.
14. Turn the disconnect switch to the “ON” position.
EDSM AND EDSM/TP
CONTROL SYSTEMS
(MAXITROL SERIES 44)
1. Remove the two mounting screws from the
Maxitrol A1044 Amplifier located in the Electrical
Control Enclosure. Refer to the Electrical Control
Enclosure Isometric Drawing (page 91) for
additional information.
2. Turn the amplifier over and adjust the amplifier
calibration potentiometer shown in the drawing.
To raise the discharge temperature, use a Phillips
screwdriver to adjust the potentiometer counter-
clockwise. To lower the discharge temperature,
adjust the potentiometer clockwise.
3. Wait for the discharge temperature and manifold
pressure to stabilize after making adjustments. Do
not rush this step.
4. In rare cases, the amplifier calibration potentiometer
will reach its adjustment limit before the proper
discharge temperature is achieved. If this occurs,
the Discharge Temperature Sensor (DTS) will need
to be adjusted:
a. Turn the burner service switch to the ”OFF”
position and allow the Discharge Air
Temperature Sampling Box time to cool.
b. Turn the blower service switch to the ”OFF”
position.
c. Open the unit access door on the control
enclosure side.
d. Remove the access cover from the Discharge
Air Temperature Sampling Box and remove the
two mounting screws from the DTS. Refer to
the Individual Component Description Section
(pages 103–109) for additional information.
e. 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.
f. Carefully reinstall the DTS. Replace the
Discharge Air Temperature Sampling Box cover,
and close the unit access doors.
g. Turn the blower and burner service switches to
the ”LOCAL” position. After a delay for the
prepurge and igniter warm-up, the burner will
light.
h. Wait for the discharge temperature to stabilize.
Do not rush this step.
i. Repeat steps 4a through 4h until the manifold
pressure and discharge temperature comply with
the guidelines of the Calibration Check procedure
step ”8b” (page 57).
5. Reinstall the amplifier that was removed in
step 1 (page 61).
EDR CONTROL SYSTEMS
(MAXITROL SERIES 14)
1. Turn the burner and blower service switches to the
”OFF” position.
2. Label and then remove the wires from terminals 1
through 3 of the Remote Heat Adjustment (RHA)
in the remote control station.
3. Remove the RHA from the remote control station.
Take the RHA to the unit control enclosure. See
Individual Component Description (page 106) for
RHA details, and Heater Configuration (page 5) for
electrical control enclosure location.
4. Remove the wires from terminals 21 and 22 of the
right-hand side of Terminal Block #1 in the unit
control enclosure. Connect these wires to terminals
1 and 3 of the RHA.