Cambridge Air Solutions M Series, Техническое руководство

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M-Series Technical Manual 37 Cambridge Air Solutions
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CAUTION:
Read the following instructions carefully. Any
unauthorized modifications to, or deviations from
these instructions may void the warranty.
1. VISUAL INSPECTION OF EQUIPMENT
a. Check for any physical damage from
shipping or installation.
b. Verify all heater accessories and filters (if
applicable) have been properly installed.
Filters may be shipped loose inside heater
cabinet.
c. Check for loose components (belts, plugs,
terminal screws, etc.).
d. Verify the access doors and electrical
enclosure doors are free from obstructions,
such as they can be fully opened /
removed.
e. Verify the field wiring, both primary and
control, have been installed according
to the Cambridge Air Solutions wiring
diagram and the National Electrical Code.
Some control circuits may need to be run
using shielded twisted pair wire; they
will be noted on the heater schematic on
“NOTE 1”.
f. Verify a sediment trap has been provided
upstream of all gas train components,
including external high pressure gas
regulators (if applicable).
g. Verify the high pressure regulator and/
or vent limiter, if applicable, have been
vented to the outside of the building at
least 10’ from any intake opening. Vent
piping cannot be reduced and cannot
exceed 20’ of linear piping. 90-degree
elbows will add 5’ to the total length of
linear pipe. The vent size will need to be
increased to the next nominal pipe size for
every 10’ over 20’.
h. Verify the factory supplied manual gas
shutoff cock is installed external to
the heater and downstream of the high
pressure regulator, if applicable.
i. Verify that the gas piping unions are tight.
j Verify that the burner union is tight.
2. ELECTRICAL SUPPLY VOLTAGE
VERIFICATION
For model M110 - M115 heaters, remove electrical
control enclosure access door and check the electrical
supply voltage at the terminal block which is adjacent
to the disconnect switch. For model M118 - M140
heaters, check the electrical supply voltage at the
disconnect switch. If the supply voltage matches the
heater nameplate, turn the disconnect switch to the “ON”
position.
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CAUTION:
Do not proceed with start-up unless the supply
voltage agrees with the nameplate voltage. If the
supply voltage does not agree with the nameplate
voltage, check with your local Cambridge Air
Solutions representative or Cambridge Air
Solutions’s Customer Service Group at 800- 473-
4569 to determine what changes are required.
3. GAS SUPPLY PRESSURE VERIFICATION
Verify that the gas supply pressure complies with the
heater nameplate.
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CAUTION:
Do not proceed with start-up unless the gas supply
pressure agrees with the nameplate pressure
requirements. If the gas supply pressure is in excess
of the maximum pressure indicated, a separate
positive shut-off high pressure regulator must be
added upstream of the heater’s individual low
pressure manual shut-off valve. If a high pressure
regulator is needed and has not been installed,
check with your local Cambridge Air Solutions
representative or Cambridge Air Solutions’s
Customer Service Group at 800-473-4569 to
determine the size and capacity requirements that
are required.
VARIABLE FREQUENCY DRIVE (VFD) START UP PROCEDURE