Dimensions, Install on a Solid, Level Mounting Pad

NOTE: Avoid contact between tubing and structure

OUTDOOR WALL INDOOR WALL

CAULK

LIQUID TUBE

VAPOR TUBE

INSULATION

THROUGH THE WALL

JOIST

HANGER STRAP

(AROUND VAPOR

TUBE ONLY)INSULATION VAPOR TUBE

1″ MIN.

LIQUID TUBE

SUSPENSION

A01383

Fig. 2—Connecting Tubing Installation

INSPECT EQUIPMENT

File claim with shipping company prior to installation if shipment is damaged or incomplete.

Step 2—Install on a Solid, Level Mounting Pad

If conditions or local codes require the unit be attached to pad, tie down bolts should be used and fastened through knockouts provided in unit base pan. Refer to unit mounting pattern in Fig. 3 to determine base pan size and knockout hole location.

On rooftop applications, mount on level platform or frame. Place unit above a load bearing wall and isolate unit and tubing set from structure. Arrange supporting members to adequately support unit and minimize transmission of vibration to building. Consult local codes governing rooftop applications.

Do not allow POE lubricant to come into contact with roofing material. POE may deteriorate certain types of synthetic roofing.

NOTE: Unit must be level to within ±2° (±3/8 in./ft).

Step 3—Clearance Requirements

When installing, allow sufficient space for airflow clearance, wiring, refrigerant piping, and service. Allow 30-in. clearance to service end of unit and 48 in. above unit. For proper airflow, a 6-in. clearance on 1 side of unit and 12 in. on all remaining sides must be maintained. Maintain a distance of 24 in. between units. Position so water, snow, or ice from roof or eaves cannot fall directly on unit.

Step 4—Operating Ambient

The minimum outdoor operating ambient in cooling mode is 55°F, and the maximum outdoor operating ambient in cooling mode is 125°F.

→Step 5—Install TXV

Puron® fan coils and furnace coils come factory equipped with a bi-flow, hard shut off TXV specifically designed for Puron® two-speed units. No TXV changeout is required. An existing R-22

TXV must be replaced with a factory approved TXV specifi- cally designed for Puron® two-speed units.

NOTE: FK4, FC4, and 40FK fan coils are equipped with an R-22 TXV. If an FK4, FC4, or 40FK fan coil is used with a Puron® air

3/8-IN. DIA TIEDOWN KNOCKOUTS IN BASEPAN

(2) PLACES

	VIEW FROM TOP				8 3/16 ″


					A97548
					A97548
	Dimensions (In.)

	MINIMUM MOUNTING	TIEDOWN KNOCKOUT
UNIT SIZE	MINIMUM MOUNTING		LOCATIONS
UNIT SIZE	PAD DIMENSIONS		LOCATIONS
	PAD DIMENSIONS		A		B
			A		B

024	19 X 24	2-13/16		6-15/16
036-060	26 X 32	4		9-3/4

Fig. 3—Mounting Unit to Pad

conditioner, the R-22 TXV must be replaced with a factory- approved Puron® TXV.

→If indoor unit is equipped with piston, remove indoor coil piston and replace with balance port hard shutoff TXV metering device.

→IMPORTANT: The 38TDB037 unit includes a factory supplied TXV kit. All other sizes do not include factory supplied TXV kit.

TXV INSTALLATION

IMPORTANT: The TXV should be mounted as close to the indoor coil as possible and in a vertical, upright position. Avoid mounting the inlet tube vertically down. A factory supplied or approved filter drier must be installed in the liquid line.

Installing TXV in Place of Piston

→1. Remove any existing refrigerant and ensure coil has not been exposed to atmospheric pressure for more than 15 minutes.

2.Remove indoor coil inlet tube at piston body inlet. Use back-up wrench to prevent damage.

3.Remove piston retainer, begin careful not to damage scaling surface of O-ring.

4.Remove and discard factory-installed piston. (Replace retainer if O-ring is damaged.)

5.Reinstall piston retainer in piston body.

6.Replace indoor coil inlet tube. Use back-up wrench to prevent damage.

To prevent damage to the unit, use a brazing shield and wrap TXV with wet cloth.

7.Sweat swivel adapter (see Fig. 5D) to inlet of indoor coil and attach to TXV (see Fig. 5A) outlet. Use backup wrench to avoid damage to tubing or valve. Sweat Inlet of TXV, marked “IN” to liquid line. Avoid excessive heat which could damage valve