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506162-02

Issue  0847

      Page  6  of   14

Heat Pump Application with Electric Heat

Emergency Heat (heating heat pump)

If selector switch on therm ostat is set to the em ergency
heat position, the heat pum p will be locked out of the
heating circuit, and all heating will be electric heat ( if
applicable).  A jum per should be placed between W  and E
on the therm ostat so that the electric heat control will
transfer to the first stage heat on the therm ostat.  This will
allow the indoor blower to cycle on and off with the electric
heat when the fan switch is in the AUTO position.

* Add Jum per on Subbase (Optional)

Start-Up Procedure

1.

Check to ensure:

!

Service valve and gage port caps are installed and
tightened.

!

Voltage supply at unit agrees with nam eplate
rating.

!

Field wiring connections are tight and factory
wiring has not been disturbed and are tight.

!

Indoor fan m otor is on correct speed tap.

2.

Set therm ostat selector switch to OFF and fan control
switch to "Auto" is so equipped.

3.

Close electrical disconnects to energize system .

4.

Set room  therm ostat at desired tem perature.  Be sure
set point is below indoor am bient tem perature.

5.

Set the system  switch of the therm ostat on CO OL (or
HEAT if applicable) and fan switch for continuous
operation (ON) or AUTO, as desired.  There will be a
5 m inute short cycle com pressor delay on startup.
Operate unit for 15-20 m inutes, then check the system
refrigerant charge.

6.

Adjust refrigerant charge per "Adjusting Charge"
section.

Adjusting Charge

Factory charge is shown on the rating label located on

the access panel.

All split  system   heat pum ps are  factory charged for

15 feet of connecting line set and m atched indoor fan
coil. 

 Nam eplate refrigerant charge should initially be

adjusted for line set lengths other than 15 feet.  For line
sets shorter than 15 feet in length, rem ove charge.  For line
sets longer than 15 feet, add charge.  Oil charge is
sufficient for all line lengths.

Before final adjustm ent is m ade to the refrigerant charge,

it is im perative that proper indoor airflow be established.
Airflow will be higher across a dry coil versus a wet coil.
Blower charts are calculated with a 

dry or wet coil

 basis.

Recom m ended airflow is 

350-450 CFM  per ton

 (12,000

Btuh) through a 

w et coil

.  Refer to indoor unit instructions

for m ethods of determ ining air flow and blower
perform ance.

Cooling Cycle Charge Adjustm ent
The optim um method for checking the charge is by
w eight.  How ever the follow ing methods m ay be used
to confirm  the proper charge:

Units with Indoor Pistons

Units installed with indoor pistons require charging with

the superheat m ethod.

The following procedure is valid when indoor airflow is

within ± 20% of its rated CFM.

1.

Operate unit a m inim um  of 10 m inutes before
checking charge.

2.

Measure suction pressure by attaching a gage to
suction valve service port.  D o not use com pressor
suction port.  Determ ine saturation tem p from  T/P
chart.

3.

Measure suction tem perature by attaching an
accurate therm istor type or electronic therm om eter
to suction line at service valve.

4.

Calculate superheat (m easured tem p. —   saturation
tem p.).

5.

Measure outdoor air dry-bulb tem perature with
therm om eter.

6.

Measure indoor air (entering indoor coil) wet-bulb
tem perature with a sling psychrom eter.

7.

Com pare superheat reading at service valve with the
chart located on control box cover.

8.

If unit has a higher suction line tem perature than
charted tem perature, add refrigerant until charted
tem perature is reached.

 9. If unit has a lower suction line tem perature than

charted tem perature, reclaim  refrigerant until charted
tem perature is reached.

Refrigeration Charge Adjustm ent

Liquid Line Diam eter

Oz. Per Linear Foot *

3/8"

.6

* Factory charge for series is for 15' (ft.) line sets and matched fan

coil.

Содержание 2HP13

Страница 1: ...l Code Part 1 CSA C22 1 2HP13 14 4HP13 SPLIT SYSTEM HEAT PUMP INSTALLATION START UP INSTRUCTIONS HOMEOWNERS INFORMATION MANUAL TABLE OF CONTENTS These units are designed for use in residential and light commercial type buildings Heat Pumps may only be installed with indoor combinations listed in the Air Conditioning and Refrigeration Institute ARI Directory of Certified Products Inspect the unit f...

Страница 2: ...nnected to factory approved indoor unit outdoor unit contains system refrigerant charge for operation with indoor unit of the same size when connected by 15 ft of field supplied tubing For proper unit operation check refrigerant charge using charging information located on control box cover IMPORTANT Maximum liquid line size is 3 8 in O D for all residential applications including long lines Outdo...

Страница 3: ...rant line lengths DO NOT LOCATE THE UNIT On brick concrete blocks or unstable surfaces Near clothes dryer exhaust vents Near sleeping area or near windows Under eaves where water snow or ice can fall directly on the unit with clearance less than 2 ft from a second unit with clearance less than 4 ft on top of unit Operating Ambient The minimum outdoor operating ambient in cooling mode is 55 F and t...

Страница 4: ...th water using a wet rag Leave rag on fitting body and re wet with water to help cool area Leak Check Refrigeration lines and indoor coil must be checked for leaks after brazing and before evacuation The recommended procedure is to apply a trace amount of vapor refrigerant approximately two ounces or 3 psig into the line set and indoor coil then pressurize with 150 psig of dry nitrogen Use a refri...

Страница 5: ... at the line side of the contactor in the control box of the outdoor unit Follow the appropriate wiring diagram attached to inside of the access panel Proper circuit protection recommendations are indicated on Unit Rating Plate Time delay fuses are required to prevent blowing due to starting current the current in rush when equipment starts is referred to as the Locked Rotor Amps or LRA A fuse of ...

Страница 6: ...or line sets shorter than 15 feet in length remove charge For line sets longer than 15 feet add charge Oil charge is sufficient for all line lengths Before final adjustment is made to the refrigerant charge it is imperative that proper indoor airflow be established Airflow will be higher across a dry coil versus a wet coil Blower charts are calculated with a dry or wet coil basis Recommended airfl...

Страница 7: ...ously Filter Drier The outdoor unit is equipped with a bi flow filter drier If replacement is necessary order new dryer according to the service parts manual Emergency Heat Function Room Thermostat An emergency heat function is designed into some room thermostats This feature is applicable when isolation of outdoor unit is required or when auxiliary electric heat is staged by outdoor thermostats W...

Страница 8: ... seconds going in and out of the defrost mode when the compressor delay jumper is removed NOTE The 30 second off cycle is not functional when jumpering the TEST pins Time Delay The timed off delay is 5 minutes long The delay help to protect the compressor from short cycling in case the power to the unit is interrupted or a pressure switch opens The delay is bypassed by placing the timer select jum...

Страница 9: ...506162 02 Issue 0847 Page 9 of 14 H P SINGLE PHASE WIRING DIAGRAM ...

Страница 10: ...506162 02 Issue 0847 Page 10 of 14 H P 3 PHASE WIRING DIAGRAM ...

Страница 11: ... manufacturers The information below is typical for most thermostats Ask your dealer for specific information regarding the model of thermostat installed Temperature Setting Levers Most heat pump thermostats have 2 temperature selector levers one for heating and one for cooling Set the levers or dials to the desired temperature set points for both heating and cooling Avoid frequent temperature adj...

Страница 12: ...s dryers and fall off from trees can be drawn into coils by movement of the air Clogged condenser coils will lower the efficiency of your unit and could cause damage to the condenser Periodically debris should be brushed from the condenser coils Use a soft bristle brush with light pressure only DO NOT damage or bend condenser coil fins Damaged or bent fins may affect unit operation Painted Surface...

Страница 13: ...lete model and serial number b proof of required periodic maintenance installation date and location c an accurate description of the problem W ARRANTY LIMITATIONS 1 This warranty is void if the covered equipment is removed from the original installation site 2 This warranty does not cover damage or defect resulting from a flood wind fire lightning mold or installation and operation in a corrosive...

Страница 14: ...506162 02 Issue 0847 Page 14 of 14 NOTES ...

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