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GENERAL
GENERAL INFORMATION
The economizer should only be installed by a trained heating and air conditioning technician. These instructions serve as a guide to the technician installing the economizer package. They are not intended as a step by step procedure with which the mechanically inclined owner can install the package.
The economizer housing is shipped in one carton which contains the electrical harness, miscellaneous hardware and installation instructions.
The economizer installation requires an additional two stage cooling thermostat in place of the normal single stage cooling thermostat. Also additional low voltage wire will be required to transmit the second call (Y2) for cool. (i.e., Use 6 conductor thermostat wire for an air conditioning unit and 9 conductor thermostat wire for heat pumps.) See Page 9 for required thermostats.
If using a Bard master controller, the MC91AE master controller is designed specifically to control two (2) redundant Bard wall mount units equipped with economizers.
Any wall mount unit equipped with an economizer must also have a low ambient control installed. This control can be factory installed or field installed. If field installed, use kit
UNPACKING
Upon receipt of the equipment be sure to compare the model number found on the shipping label with the accessory identification information on the orders and shipping document to verify that the correct accessory has been shipped.
Inspect the carton housing of each economizer as it is received, and before signing the freight bill, verify that all items have been received and that there is no visible damage. Note any shortages or damage on all copies of the freight bill. The receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent. Concealed damage not discovered until after loading must be reported to the carrier within 15 days of its receipt.
DESCRIPTION
The
TABLE 1
(1) |
| FOR USE WITH |
| ||
MODEL |
| FOLLOWING UNITS |
| ||
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| WA38 |
| WL42 |
| WH42 |
|
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| WA42 |
| WL48 |
| WH48 |
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|
|
|
|
| WA48 |
| WL60 |
| WH60 |
|
|
|
|
|
|
WA49 |
| WL70 |
| SH38 | |
|
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|
|
| |
WA60 |
|
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| SH43 | |
|
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| ||
|
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|
|
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| WA61 |
|
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| SH49 |
|
|
|
|
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| WA70 |
|
|
| SH61 |
|
|
|
|
|
|
| WA72 |
|
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(1)Low ambient control is required with economizer for low temperature compressor operation.
EIFM models not suitable for use with hot gas bypass models.
Manual