Installation Guide

ManualsBrandsASPEN ManualsDownflow CoilsASPEN CA Series Uncased Upflow-Downflow Coils

# 123105

1. Following outdoor unit manufacturer instructions and recommen-

dations, charge the system with dry nitrogen to a maximum pressure

of 150 PSIG.

3. If any leaks or are discovered, relieve system pressure and repair

leaks. Repeat steps 1-3.

4. With no leaks or weak connections present, evacuate the system

and charge as per the outdoor unit manufacturer instructions and

specications.

2A. Flowrator coils: Add refrigerant until the superheat measured at

the outdoor unit suction/vapor line matches the superheat from the

chart below.

Using a non-bleed expansion valve may re-

quire the use of a hard-start kit. Follow the

outdoor unit manufacturer’s guidelines.

CAUTION

An improperly charged system will likely

cause loss in system performance and

may damage the compressor.

CAUTION

Refer to outdoor unit manufacturer charg-

ing guidelines and recommendations. The

recommendations given below are general

in nature and are NOT to supersede outdoor unit manufac-

turer specications.

CAUTION

8. Leak Check

9. System Charging

2. Check all brazed and screw-

on line connections by applying a

soap solution to the joint. A leak

will produce bubbles in the soap

solution.

2B. TXV coils: Add refrigerant until the subcooling measured at the

outdoor unit liquid line matches the subcooling recommendation of

the outdoor manufacturer. If chart is unavailable charge the unit to a

subcooling value of 8ºF +/- 1ºF.

Outdoor

Temp

Superheat

°F D.B. Min Nom Max

65 30 35 40

70 26 30 34

75 21 25 29

80 17 20 23

85 12 15 18

90 8 10 12

4 5 7

100

10. Coil Cleaning Instructions

Aspen cased coils are equipped with a two-piece panel door to allow

for cleaning and maintenance access. Remove one or both doors to

access the coil for cleaning.

For both copper and aluminum tube coils, it is recommended to ush

with the coil with water. There are coil cleaners that are available

that contain corrosive chemicals, such as, but not limited to, chlorine

and hydroxide, that are not approved for use on Aspen copper and

aluminum tube coils.