Venmar 1200 cfm Spezifikationen PDF herunterladen (Seite 15)

Annual Maintenance

Annual maintenance should include:

Air Filters

Vacuum and wash standard foam ﬁlters. Replace medium

efﬁciency ﬁlter if present.

Drain Pans and Interior of Unit

Wash the foil faced insulation surfaces and wipe the drain

pans with a soft cloth and mild cleaning solution. Check

the drain ﬁttings to ensure they are draining freely.

Flat Plate Heat Exchanger

The ﬂat plate heat exchanger must be handled with care.

Remove the ﬂat plate heat exchangers by sliding them out

from the tracks holding them in place. In order to ensure

maximum efﬁciency of the partitions, it is recommended

that the heat exchanger be cleaned once a year following

the season of most intense use. For polypropylene and alu-

minum media, allow the heat exchanger to soak for three

hours in warm water and mild soap. Rinse under a heavy

stream of water. For HM heat exchangers, use a vacuum

cleaner or low pressure air. It is not recommended to use

solvents or detergents as these may damage the media

or structure of the heat exchanger. When replacing the

ﬂat plate heat exchanger sections, ensure they are of the

proper vertical orientation. Failure to do so may result in

low airﬂow on the exhaust airstream due to system pres-

sure trapping or holding condensate in the ﬂutes.

Fans

Blower wheels and fan housing should be checked for

dirt buildup. If they appear dirty, it may be necessary to

remove the blower assembly and then vacuum the dust

out through the fan mouth. See Figure 1 and Figure 2 for

instructions on removing the blower assembly.

System Operation Check

Veriﬁcation of all control modes should be checked to en-

sure proper operation. Refer to Sequence of Operation.

Testing and Replacement of the Damper

Actuator

Check damper operation by switching between Low–Com

or High–Com on the low voltage terminal strips or by

switching through the modes on the optional remote wall

control. If the damper does not respond in one or both

directions, check all connections.

700 cfm Only

Check for 24V output between the white/red and the

white/orange wires at the damper motor. If 24V can be

measured at the damper motor, the problem is either in

the connections, the frost control relay or the microproces-

sor control board.

600 and 1,200 cfm Only

With the unit powered but off, check for 120V output

across the white/black wires. If 120V can be measured at

the motor, replace the motor. If 120V cannot be measured

at the motor, check for 120V across pins J1-9 and J1-1 at

the microprocessor control board.

Microprocessor Control Board Replacement

The microprocessor control board must be replaced if an

electronic problem arises. For example, the unit suddenly

stops, the unit stays in frost control mode all the time or if

control functions are not working properly.

Ensure that power is reaching the microprocessor control

board. Test the blower motors and damper actuators for

operation when directly connected to the appropriate

power voltage. If the motor and damper actuators func-

tion normally, replace the main microprocessor control

board.

Motor and Blower Removal and Installation

Disconnect power from the unit. To determine if the fan

motor is burned out, disconnect the four-wire service

connector between the motor and cabinet. Connect the

motor directly to a 120V power source with an electrical

cable as follows:

WARNING

Disconnect the main power switch to the unit before per-

forming service and maintenance procedures.

WARNING

Hot water and strong cleaning agents could damage the

heat exchanger. Ensure the heat exchanger is returned to

the unit in the correct orientation. Failure to do so may

result in damage to the exchanger. Follow instructions on

the label.

CAUTION

120 VAC.

Table 5: Motor Connections

Red + White Low speed

Blue + White Medium speed

Black + White High speed

VCES-HRV-IOM-1C – HRV600i, HRV700i, HRV1200i

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 38 39

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