MTD 248-604A Manual de instalación descargar pdf (Pagina 40)

Page 40 of 42 Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ IM 1083

Complete Check, Test and Start Procedure

Renewable Media

(Single-use and

Permanent Wire

Mesh Filters Also

Available.)

Provide completed Check, Test and Start form to your local AAF

HermanNelson

representative and specifying engineer for verication

that proper start-up was completed.

The form is enclosed in the manila envelope located behind the left

front access door.

Turn off the unit (fan speed switch or unit on/off switch is located

behind the right front end compartment panel). Remove the center

front panel, pull out the lter and replace with a clean lter. Replace

the center panel and restart the unit.

Filters should be replaced during the rst week of placing into service

to prevent dirt carry-over into the internals of the unit and back into the

classroom (see gure 75). A periodic lter changeout program should

be established. Filters should be checked monthly or more often if

conditions indicate. Filters are included in all units.

Filter

Motor

Figure 75: Filter Installation

Installer/Owner’s Responsibility

Protect your investment - read carefully

Your Daikin express written limited warranty does not cover equipment

failures that are caused by misuse, abuse, mis-installation, failure to

maintain the unit, etc. Here are a few examples of the types of damage

not covered by warranty:

1. Damage resulting from handling during transportation or

installation.

2. Damage to compressor resulting from improper electrical phase

hook up.

3. Progressive damage to unit from failure to check and test at start-

up.

4. Damage to electronic or electrical components from incorrect

or uctuating power supply, stray static electricity, or building

automation network inputs.

5. Inaccessibility of unit for service or parts installation that prevents

proper equipment operation.

6. Damage to aluminum coils and electronic controls, etc., resulting

from operating the unit while building maintenance cleaning agents

are in use.

7. Damage resulting from freezing water or condensate, inadequate

or interrupted water supply, use of corrosive water, rearrangement

of unit piping system, fouling or restriction of the water circuit by

foreign material.

8. Damage caused by not cleaning or replacing lters.

9. Damage resulting from failure to keep evaporator coil and intake

clean.

10. Damage caused by accident, alteration of the unit design or

tampering.

Please complete and return the Check, Test and Start document

immediately to protect your warranty.

1. Before proceeding, inspect the fan system, to verify that all parts are

aligned properly and move freely. Inspect fans and fan discharge area

for obstructions. Verify that power has been disconnected. Rotate

the fan assembly manually. Check that a clean lter is installed and

the area in front of unit ventilator is free of debris. All panels should

be in place and properly fastened. Check for outdoor air leaks and

condensation. Verify that the coil section is properly sealed using

the insulating foam donuts supplied.

2. After the unit ventilator has been properly installed, activate unit

electrical power and applicable refrigerant systems

3. Using the applicable control, activate the unit ventilator. Depending

on the operating mode selected, the dampers, fans, and other

components should operate as needed.

4. Run the unit ventilator for ten minutes, listening and observing. Fans

should be operating correctly and rotating in the proper direction,

without unusual noise. Likewise, the unit should be free of sheet

metal rattles and / or unusual noises. All panels should be in place

and properly fastened. Check for air leaks and condensation.

Compressor should run without noise. If noisy, check electrical

phases to verify that the compressor is rotating correctly. Phase

reversal can damage the compressor and void the warranty.

Prepare for Start-up

Units must have a lter installed when operating. Operation

without a lter can compromise unit performance due to build

up of dust and dirt on components.

CAUTION

Electric heat units should ONLY use permanent wire mesh lters.

Filters other than wire mesh are not intended for electric heat units,

and can cause unit damage, property damage or personal injury.

CAUTION

Remove debris, dust, dirt, and any obstruction from the area

in front of the return air intake grille at the oor.

CAUTION

Dirty or clogged lters can impact unit performance, and damage

the unit.

CAUTION

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