Heat Controller HTH Field Conversion of Air Discharge, Htv/Htd/Hth Series, Heat Controller, Inc

Installation, Operation & Maintenance HTV/HTD/HTH SERIES Heat Controller, Inc.

Field Conversion of Air Discharge

Overview - Horizontal units can be field converted between side (straight) and back (end) discharge using the instructions below.

Note: It is not possible to field convert return air between left or right return models due to the necessity of refrigeration copper piping changes.

Preparation - It is best to field convert the unit on the ground before hanging. If the unit is already hung it should be taken down for the field conversion.

Side to Back Discharge Conversion

1. Place unit in well lit area. Remove the screws as shown in

Figure 4 to free top panel and discharge panel.

Figure 4: Left Return Side to Back

Water	Remove Screws
Connection End

Return Air

Side Discharge

Water

Connection End

2.	Lift out the access panel and set aside. Lift and rotate the
	discharge panel to the other position as shown, being careful
	with the blower wiring.
3.	Check blower wire routing and connections for tension or
	contact with sheet metal edges. Reroute if necessary.
4.	Check refrigerant tubing for contact with
	other components.
5.	Reinstall top panel and screws noting that the location for
	some screws will have changed.
6.	Manually spin the fan wheel to ensure that the wheel is not
	rubbing or obstructed.

Water

Rotate

Return Air

Move to Side

Replace Screws

7. Replace access panels.

Back to Side Discharge Conversion - If the discharge is changed from back to side, use above instruction noting that illustrations will be reversed.

Left vs. Right Return - It is not possible to field convert return air between left or right return models due to the necessity of refrigera- tion copper piping changes. However, the conversion process of side to back or back to side discharge for either right or left return configuration is the same. In some cases, it may be possible to rotate the entire unit 180 degrees if the return air connection needs

Connection End

Back Discharge

Return Air

Drain

Discharge Air

to be on the opposite side. Note that rotating the unit will move the piping to the other end of the unit.

Figure 5: Right Return Side to Back

Return Air

Supply Duct

Side Discharge

Water

Connection End

Water

Return Air

Drain

Discharge Air

Connection End

Back Discharge

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