Page 1
515.26-N1Y (1092)
Product Generation
012 = 1 Tons
018 = 1.5 Tons
018
®
OUTDOOR
SPLIT-SYSTEM HEAT PUMPS
INSTALLATION INSTRUCTION
MODELS E1FB012 thru E1FB030
GENERAL
This instructi on co ve rs the ins tallation of the fol lowing o ut door
units: E1FB012A(S)06, E1FB018A(S)06, E1FB024A(S)06,
E1FB030A(S)06, E9FB012S06, E9FB018S06, E9FB024S06,
and E9FB030S06.
The outdoor unit s are desig ned to be connec ted to a matching
indoor coil with either quick or sweat connect lines. Quick
connect units are factory charged with refrigerant for a matching indoor coil and factory charged line sets are available in
various lengths. Sweat connect units are factory charge d wi th
refrigerant for a matching indoor coil plus 15 feet of field
supplied lines.
Matching indoor coils are available with a thermal expansion
valve or an orifice liquid feed (YORKMA TE flow control devi ce)
sized for the most common usage. The orifice size and/or
refrigerant charge may need to be changed for some indooroutdoor unit combinations, elevation differences or total line
lengths. Refer to Application Data covering “General Piping
Recommendations and Refrigerant Line Le ngt h”.
INSPECTION
Supersedes: 515 .26-N1Y (1291)
AND E9FB012 thru E9FB030
CAUTIONS are given to preve nt equipmen t dama ge.
WARNING S are given to alert the ins taller that personal injury
and/or equip ment damag e may r esult if ins tallatio n proc edures
are not followed properly.
NOMENCLATURE
Product Category
E = Outdoor Split System H eat Pump
1 = Design Level
9 = Canada
Product Identifier
FB = High Efficiency Heat Pump
Nominal Cooling Capacity
Refrigerant Line Connections
A = Quick-Connect Fittings
S = Sweat Fittings
V oltage Code
06 = 208/230-1-60
LIMITATIONS
The unit should be installed in accordance wit h all national and
local safety co d es.
Limitations for the ind oor unit, coil and appropriat e accessories
must also be observ ed.
The outdoor unit mu st not be installed wit h any ductwork in the
air stream. The outdoor fan is the propeller type and is not
designed to opera te against any addit ional external sta tic pressure.
The maximum and minimum conditions for operation must be
observed to assure a syst em th at will give maximum per fo r mance with minimum service.
E
024 = 2 Tons
030 = 2.5 Tons
1 FB
035-10021
A 06
As soon as a un it is received, it should be ins pected for pos sible
damage during transit. If damage is evident, the extent of the
damage should be not ed on the carrier’s freight bill. A separate
request for inspec tion by the carrier’s agent should be made in
writing. See Form 50.15-NM for more information.
REFERENCE
Use this instruction in conjunction with the instructions for the
appropriate indo or unit , air moving s yst em and ac cessories.
Installer should pay particular attention to the words:
CAUTION
NOTES are intended to clarify or make the installatio n easier.
and
WARNING.
NOTE,
LOCA TION
TABLE 1 - A PPLICATI ON LI M ITATIO N S
AIR TEMPERATURE °DB
ON OUTDOOR COIL
Min. Max. Min. Max.
Cool Heat Cool Heat
50 -10* 115 75 57 50** 72 80
* If ambient will be below this, Accessory Kit 2LT06700224 must be installed to
cutoff heat pump.
** Operation below this temperature is permissible for a short peri od of time,
during morning warm-up.
AIR TEMPER ATURE
ON INDOOR COIL
°WB
Cool
°DB
Heat
°WB
Cool
°DB
Heat
Page 2
515.26-N1Y
Before start in g th e ins ta llat ion , selec t and check the suitability
of the location for b oth the indo or and outdoor unit . Observ e all
limitations and clearan ce req uiremen ts, see Figure 2.
Normal operating sound levels may be objectionable if the unit
is placed directly under windows of certain rooms (bedrooms,
study, etc.).
The outdoor unit must have sufficient clear ance for air entrance
to the condens er coil, for air dis charge a nd for s ervice access .
If the unit is to be installed on a hot sun exposed roof or a
black-topped grou nd area, the unit shoul d be raised suf ficiently
above the roof or ground to avoid taking the accumulated lay er
of hot air in to the outdoor unit .
Provide an adequat e s truc tu ral su ppor t.
The unit may be installed at ground level on a solid base that
will not shift or settle, causing strain on the refriger ant lines and
possible leaks. Maintain the clearances shown Figure 2 and
install the unit in a level position. Isolate the base from the
building struct ure t o avoid no ise or vib rat ion t ran smis sio n.
When installing units on a roof, the structure must be capable
of support ing the tot al weight of the unit, inclu ding a pad, lintels ,
rails, etc., which should be used to minimize the transmission
of sound or vibration int o t he conditioned space.
Isolate the uni t from rain gutters to avoid any possible was h out
of the foundation.
Condensate will drain from ben eath the coil of the outdoor uni t
during the defrost cycle. Normally this condensate may be
allowed to drain directly onto the ground. A gra vel bed may be
used to prevent mud splas hi ng.
WARNING:The outdoor unit shou ld not be insta lled i n an area
where mud or ice could cause personal injury.
Remember that condensate will drip from the unit
coils during heat and defrost cycles and that this
condensat e will freeze when the temperature of the
°
outdoor air is below 32
F.
Elevate the unit sufficiently to prevent any blockage of the air
entrances by snow in areas whe re the re will be snow accumulation. Check the local weather bureau for the expected snow
accumulation in your area.
INSTALLATION PROCEDURES
The following sequence of install at ion ste ps is sugge sted.
1. Inspect unit and set in place.
2. Make electrical power connections .
3. Check orifice size and replace with correct size if necessary.
TABLE 2 - PHYSICAL AND ELECTRICAL DATA
UNIT MODEL E1FB / E9FB... 012 018 024 030
UNIT SUPPLY VOLTAGE
NORMAL VOLTAGE RANGE
MIN. CIRCUIT AMPACITY
MAX. OVERCURRENT DEVICE AMPS
COMPRESSOR AMPS
1
2
RA TED LOAD
LOCKED ROTOR
12.0 12.0 15.2 19.2
15 15 20 25
7.4 7.4 9.7 12.3
48 48 60 73
CRANKCASE HEA TE R YES YES YES YES
F AN MOT OR AMPS
RA TED LOAD
LOCKED ROTOR 1.9 1.9 1.9 1.9
MIN. FI EL D W I RE SI ZE A W G .
COPPER CONDUCTORS
MAX. WIRE LENGTH ( FEET)
BASED ON 3% VOLTAGE DROP
FAN DIAMETER INCHES
RA TED HP
FAN MOTOR
NOMINAL RPM
60°C
208V
230V 86 86 110 90
0.8 0.8 0.8 0.8
14 14 12 12
77 77 99 81
18 18 18 18
1/8 1/8 1/8 1/4
1075 1075 1075 1075
NOMINAL CFM 2000 2000 1900 2200
15.1 15.1 14.1 14.1
1122
COIL
F ACE AREA SQ. FT.
ROWS DEEP
FINS/INCH 16 16 13 13
LIQUID LINE CONNECTION 5/16 5/16 5/16 5/16
VAPOR LINE CONNECTION 5/8 5/8 5/8 3/4
OPERA TI NG WEI G HT LBS.
(1) Utilization range “A” in accordance with ARI standard 110.
(2) Dual element fuses or HACR circuit breaker.
148 148 170 172
208/230-1-60
187 to 252
2 Central Environmental Systems
Page 3
4. Route the vapor and liquid lines .
48" OVERHEAD
CLEARANCE
TO
INDOOR
COIL
Check local weather bure au for s no w
accumulation / clearance
5. Connect tu bing an d leak test.
6. Make electrical control connections.
7. Charge system.
8. Instruct owner.
UNIT PLACEMENT
1. Provide a base in the pre-de termined location.
2. Remove the shipping ca rton and inspec t for possi ble damage.
3. Compres sor tie-down bol ts should remain tightened.
4. Position t he un it on the base prov ide d.
5. Sit unit on the (4) rubber elevating g rommets prov ided with
the unit. These should be pos itioned as shown in Figure 1
to reduce noise and allow for prop er drainage.
UNIT
BASE
PAN
515.26-N1Y
6. Make a hole(s) in the structur e wall large enough to acco mmodate the insulated vapor line, the liquid line and the
wiring.
ELECTRICAL CONNECTIONS
1. Check the electrical supply to be sure that it meets the
values specifie d on t he uni t name plat e and wiring lab el.
2. Remove prope r low voltage knockout . Remove plastic snap
bushing from instruction packet and insert in low voltage
knockout hole.
3. The complete connection diagram and schematic wiring
label is located on the inside surface of the unit electrical
box cover. Ty pic al Field Wiring is shown in Figu re 3.
4. All field wiring to be in accordance with national electrical
code (NEC) and/or local city codes.
NOTE: Power wiring, dis conne ct switch, and overcurre nt pro-
tection to be supplied by installer. See Physical and
Electrical Data Table for proper sizes. USE COPPER
CONDUCTORS ONLY. Unit must be grounded with a
separate ground conduc t or wire.
RUBBER
ELEVA TING
GROMMETS
(4)
Note: Do Not block drainage
holes with grommets.
FIGURE 1 - POSITIONING OF RUBBER ELEVATING
GROMMETS
THERMOSTAT
TO POWER
SUPPLY
TO
BLOWER
MOTOR
RELAY
NEC CLASS 2
WIRING
NEC CLASS 1
WIRING
5. Install the proper s ize weath erproof disconnect switc h outdoors and within sight of the un it.
6. Run power wiring from the disconne ct s witch to the unit .
7. Install the proper size time-delay fuses or circuit breaker,
and make the power supply conne ction s.
8. Energize the crankcase heater, if applicable, to save time
by preheating t he compressor oil while the remaining installation is comp let ed.
WEA THERPROOF
DISCONNECT
SWITCH
12" REAR
AND SIDES
Sit unit on
rubber
elevator
grommets to
reduce noise
and allow for
proper
drainage.
NOTE: ALL OUTDOOR WIRING
MUST BE WEATHERPROOF
FIGURE 2 - TYPICAL INSTALLATION
Central Environmental Systems 3
24" SE R VICE
ACCESS
SEAL OPENING(S) WITH
PERMAGUM OR EQUIVALENT
Page 4
O
66
W
B
Y
7 WIRES
GRD.
LUG
DEFROST
CONTROL
CONTACTOR
GRD.
SCREW
M
T1
L1
L2
R
X
53
R
60
66
G
O
B
X
W
Y
R
G
O
B or C
L or X
W
Y
7 WIRES
OUTDOOR UNITTHERMOSTAT INDOOR UNIT
T2
POWER W IRI NG
208/230-1- 60
POWER WIRING
24V CONTROL WIRING
(NEC CLASS 2)
CIRCUIT
THERMOSTAT
Jumper terminals E and W to heat
on first stage during Emergency Heat.
LOW VOLTAGE TERMINAL BLOCK
IN AIR HANDLER WITH ELECTRIC HEAT
Check the low voltage terminal block on the indoor unit for the actual arrangement of the terminals.
BREAKER***
ALL WIRING TO BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND/OR LOCAL CODES
Connect power wiring to terminal block 3TB on units without electric heat or units without a circuit breaker..
T
E
FIELD
INSTALLED
JUMPER
1
3,4
1
2
2
3
4
Terminal not used on all thermostats.
2
THERMISTOR
IMPORTANT
035-03095A
515.26-N1Y
The crankcase heat er , when furnish ed, is energize d whenever
the compressor is not running. Check for proper operation by
feeling for heat on the compressor whe re the heater is inst alled.
The heater should be energized for at least 8 hours bef ore the
thermostat is set to operate the compresso r.
the field supplied dis connect swit ch where it will be eas ily seen.
See below:
CAUTION: An attempt to start the compress or without at leas t
8 hours of crankcase heat will damage the compress or.
A warning label with an adhesive back is supplied in the unit
installation inst ruct ion p acket . This label s hould be at tach ed t o
FIGURE 3
- TYPICAL FIELD WIRIN G (AIR HANDLER WIT H ELECTRIC HEAT)
IF POWER HAS BEEN OFF FOR 8 HOURS OR LONGER,
DISCONNECT SWITCH MUST BE TURNED ON 8 HOURS
BEFORE THERMOSTAT IS SET TO “HEAT”, “COOL” OR
“AUTO”.
4 Central Environmental Systems
Page 5
DEFROST
LIQUID
LINE
TAPE
SHEE T
METAL
HANGER
INSU LATED
VAPOR LINE
TO INDOOR COIL
TO OUTDOOR UNIT
LIQUID LINE
CAP
PVC
CONDUIT
INSULATED
VAPOR LINE
The unit has a demand defrost control.
During troubleshooting, defrost can be initiated by shorting
defrost test pins on the module. The pins are about 1/2" long
and mounted on the upper right hand side of the defrost
control.
TUBING CONNECT IO NS
Sweat-connect systems must use field supplied, clean, dehydrated refrigerat ion-g rade copper tubing.
Quick-connect systems must use pre-charged refrigerant line
sets (quick-connect couplings) designated for the respective
unit size and available from CES. Pre-charged lines with excess tubing should be coiled horizontally in an inconspicuous
location to avoid oil t rapp ing.
Stub kits are available to field f abricate quic k connect line sets
or to connect mix-matched unit s and coils.
Unit should be installed only with approved system combinations (indoor coil/ ou td oor uni t) spec if ied in Technical Guide.
515.26-N1Y
Additional charge is required for in ter-connecting piping greater
than 15 feet for sweat units and some indo or co il ma tche s.
The lines should be installed so that they will not obstruct
service access to the coil, air handling system or filter. Install
the lines with as few bends as possible. Care must be taken
not to damage the coupl ings or kink the tubing. Care must al so
be used to isolate the refrigerant lines to minimize noise
transmissio n fro m the equipment to the structure.
Tape and suspend the refrigerant lines as shown. DO NOT
allow metal-to-metal contact.
See Application Data,"General Piping Recommendations and
Refrigerant Line Length," for vapor and liquid line sizing, calculation of liquid line pressure loss or gain, determination of
vapor line velocity, elevation limitations, orifice corrections,
system charging, trap s, etc.
Total line lengths are limited to 75 feet due to the storage
capacity of the accumulator. Systems with total line lengths
over 50 feet must be provided with a low volt ag e start kit.
Elevation differences are limited to:
Indoor Above Outdoor . ...... 50 ft.
Outdoor Abov e Indoor.......50 ft.
Systems with liquid line pressure loss or gain greater than 11
psi must be provided wit h correc t ed orif ic e size .
Inter-connec ting refrigera nt lines should be sized to match the
factory s upplied fit tings. Li quid lines must
or decreased. Vapor lines
may be increased one size to mini-
NEVER be increased
mize pressure drop as long as a velocity of at least 1000 feet
per minute is maintained.
FIGURE 4 - TUBING HANGER
Use PVC piping as a conduit for all underground installations
as shown below. Buried lines should be kept as short as
possible to minimize the build up of liquid refrigerant in the
vapor line during long perio ds of shut down.
FIGURE 5 - UNDERGROUND INSTALLATION
Central Environmental Systems 5
Page 6
515.26-N1Y
Pack fiber glass insulation and a sealing material such as
permagum around refrigerant lines where they penet rate a wall
to reduce vibration and to retain so me flexib ilit y.
Each coil will hav e an orific e instal led i n the fi tting be tween th e
liquid line conn ection and dis tributor . The orifice is identified on
a label next to the liquid connecti on as shown in Figure 6.
Do not install a filter drier since one is factory installed in every
outdoor unit.
The orifice that is shipped with the coil is based on the “most
sold” combination, but it may have to be changed, depending
on the capacity and efficiency of the outdoor unit, elevation
Insulate all vapor lines with a minimum of 1/2" foam rubber.
Liquid lines that will be exposed to direct sunlight and/or high
temperatures must also be insula te d.
differences, and/or long total line lengths. An additional ori-
fice(s) is shipped wit h most outdoor units in the literature pac ket
for the most commonly required replacement combinations.
Other sizes must be ordered from the Parts Department if
ORIFICE SELECTI ON
YORKMATE FLOW CONTROL COILS
NOTE: The proper orifice must be installed in the evaporator
coil liquid connection prior to the connection of the
refrigerant lines.
WARNING:Coil (whether sweat or quick connect) is under 15
PSIG press ure.
required.
Table 3 shows the orifice and charge ad jus tment for approved
system combinations (indoor coil/outdoor unit). See Applica-
tion Data,"General Piping Recommendations and Refrigerant
Line Lengths" for long line lengt hs and e lev ation differences.
If the orifice sizes match, nothing further is required and the
refrigerant lin es may be connected per the out door unit ins truc-
TABLE 3- ADDIT IO NAL R-22 CHARGE/OR IFICE SIZ E
OUTDOOR UNIT E1FB / E9FB... 012 018 024 030
UNIT ORIFICE(S)
FACTORY R-22
CHARGE, LBS. OZ.
INDOOR COIL
G3HC / G1FC018 55 55+9 55+0 - G3HC / G1FC024 61 - 55+9 61+3 G3HC / G1FC030 69 - - 63+13 69+15
G3HC / G1FC036 81 - - - 69+23
G3HC / G1FC042 78 ---G3HC / G1FC048 90 ---G3HC / G1FC060 96 ----
G3US018 55 55+9 55+5 - G3UA024 59 - 55+9 61+3 G3UA030 65 - - 63+1 G3UA036 69 - - 63+12 69+13
G3UA037 69 - - 63+12 69+13
G3UA04887---G3UA06096---G3UA06196---G2UT024 - - - +3 G2UT036----+13
G2UT037----+13
G3CN030 65 55+28 55+23 63+11 67+20
G3CN042 73 ----
G3CN060 87 ---F1SA / F1SF018 53 55+0 53+2 - F1SA / F1SF024 61 - 55+3 61+0 F1SA / F1SF030 67 - - 61+0 67+10
F1SA / F1SF036 81 - - - 67+14
1These orfices are packed in the instruction/warranty packet of each outdoor unit.
2
These orifices are factory-mounted in the flow control device of each indoor coil.
NOTE: Orifices in ( ) must be ordered from the Parts Department.
1
SWEAT 5-0 5-5 7-10 7-10
QUICK 4-9 4-14 7-3 7-3
COIL
ORIFICE2
55 55 61, 63 67, 69
SYSTEM ORIFICE + ADDITIONAL CHA RG E, OZ.
6 Central Environmental Systems
Page 7
tion. However, if another orifice should be used, see the coil
instruction f or det ails to change the orif ic e in the c oil.
515.26-N1Y
DO NOT OVERTIGHTEN (between 40 and 60 inch-lbs.
maximum).
LABEL
DISTRIBUTOR
LEFT-HAND THREAD
COIL EQUIPPED
WITH #65
ORIFICE
ORIFICE
LIQUID LIN E
FITTING
FIGURE 6 - ORIFICE LABEL
QUICK CONNECT SYSTEMS
Indoor coils and outdoor units are to be connected with precharged interc onnecting tubing spec ified f or the s plit syst ems .
The units and the lines are equipped with sealed one-time
quick-connect couplings which, when screwed together, will
have their seals broken, allowing for free passage of refrigerant. One end of the tub ing co ntains a female f itting for con necting to the outdoor unit. The other end has a male fittin g with a
90° bend on the vapor line for connec tin g to th e indoo r coil.
The outdoor end of the lines have capped service (Schrader)
ports. Install the coupling in a position that will permit a
Schrader tool to be at tac hed to the serv ic e port .
Prepare and connect fitting s as follows :
1. Begin at either t he indo or co il or the outdoor unit. Remo ve
only one dust cap at a time to avoid damage a nd to prevent
dirt from getting into the other. If necessary, carefully wipe
seals and threaded s urf ac es with a clean c lot h.
2. Lubricate the male half diaphragm and the “O” ring with
several drops of refrigerant oil. Thread the halves together
by hand to insure proper mating of the threads. Use proper
size wrenches (on both the body hex and on the union nut)
and tighten unt il bod ies “bot t om” or a def in ite res is ta nce is
felt.
6. Do not re mo ve t he f lare cap s from the serv ice po rts excep t
when neces sa ry for s erv icing the system.
CAUTION: Do not connect manifold gauges unless trouble is
suspected. Approxi mately 3/4 oun ce of refrigeran t
will be lost each time a standard manifold gauge is
connec ted.
7. The quick c onnect outdo or unit cont ains enoug h refrigeran t
charge for a matched evaporator. Refer to Table 3 for the
amount of additional charge required for some mixmatched indoor coils. If additional charge is required, see
recommended c harg ing met hods.
SWEAT-CONNECT SYSTEMS
The outdoor units have re-usable service valves on both the
liquid and vapor connections. The total system refrigerant
charge is retained within the outdoor unit during shipping and
installation. The re-usable service valves are provided to
evacuate and ch arge pe r thi s inst ruc tion.
Serious service problems can be avoided by taking adequate
precautions to assure a n int erna lly c lea n and dry sy stem.
Always use refrigeration-grade copper tubing that is internally
clean and dry f or refrigerant lin es. Use clean ha rd drawn copper
tubing where no appreciable amount of bending around obstruction is neces sary. If soft copper must be used, care must
be taken to avoid sharp bends which may cause a restrict ion .
The vapor line must be insulated with a minimum of 1/2 inch
insulation (Arm-A-Fle x or equiv alen t).
CAUTION: Dry nitrogen should always be supplied through
the tubing while it is being brazed, because the
temperature requ ired is high enough to cause oxidation of t he copp er unl ess an inert atmos phere is
provided. The flow of dry nitro gen should continue
until the joint has cooled. Always use a pressure
regulator and safety valve to insure that only low
pressure dry n it rogen is in troduc ed int o the tubing .
Only a small flow is necessary to displace air and
prevent ox idation.
All outdoor unit and evaporator coil connection s are cop per-tocopper and should be brazed with a phospho rous-copper alloy
material such as Silfos-5 or equivalent. DO NOT use soft
solder.
3. Using a marker or ink pen, mark a line length wise from the
union nut to the unit panel. Then tighten an additional 1/4
turn (90° from the mark on the panel to the mark on the
union nut).
4. Repeat this procedure with the other three in the system,
removing the dust cap jus t prior t o mak ing the c onne ctio n.
5. Leak test all refrigerant piping connections including the
service port flare cap s to be sure they are lea k tight .
Central Environmental Systems 7
BASE VALVE CONNECTION PRECAUTIONS
Precautions should be taken to prevent heat damage to the
fitting by wrapping a wet rag around it as shown in Figure 7.
Also, protect al l painted surfaces and insulation durin g brazing.
After brazing - cool joint wit h wet rag.
WARNING: This is not a backseating valve. The ser vice access
port has a valve core. Opening or closing valve
does not close service access port.
Page 8
515.26-N1Y
Valve can be opened by removing the plunger cap and fully
inserting a h ex wre nch int o the stem and backin g o ut count erclockwise until valve stem just touches ret aining ring.
NOTE: Do not use the system refrigerant in the outdoor unit
to purge or leak test.
8. Leak test all refrigerant piping connections including the
service port flare caps to be sure they are leak tight. DO
NOT OVERTIGHTEN (bet ween 40 and 60 inch - lbs. maximum).
9. Do not remo ve th e flar e caps fro m the se rvice ports excep t
when neces sa ry f or servicing the syst em.
CAUTION: Do not connect manifold gauges unless trouble is
suspected. Approxima tely 3/4 ounce of refrigeran t
will be lost each time a standard manifold gauge is
connec ted.
FIGURE 7 - HEAT PROTECTION
CAUTION: If visual verificati on ot the valve stem reaching the
retaining ring is impossible, stop backing out the
valve stem when the slightest increase in resistance is felt. Because of the small size and therefore the reduced resistance, back out the liquid
5 turns maximum
valve
retaining ring.
WARNING: If the valve stem is backed out past the retaining
ring, the O’ring can be damaged causing leakage
or system pressure could force the valv e s tem ou t
of the va lve body pos sibly caus ing pe rso nal injury.
In the event the retaining ring is missing, do not
attempt to open th e valve .
Replace plunger cap f inger tight, then tigh ten an additional 1/12
turn (1/2 hex flat). Cap must be replaced to prevent leaks.
LINE INSTALLATION
Install the ref rige rant line s using the following pr oce dure :
1. Remove the cap a nd Schrader core from both the liquid and
vapor fitting service ports at the outdoor unit. Connect low
pressure nit roge n t o the liqui d line serv ic e port .
to prevent going past the
10.Releas e refrigera nt charge into the s ystem. O pen both the
liquid and vapor fittings by removing the plunger cap and
with an allen wrench back ou t counter- clockwise until val ve
stem just touches retaining ring. See Base Valve Connection Precaut ion s.
11. The sweat connect outdoor unit contains enough refrigerant charge for a matched evaporat or and 15 fe et of tubing .
Refer to the Table 3 for the amount of additional charge
required for some mix-matched evaporators. Additional
charge for lines longer than 15 feet is shown in Table 4. If
additional charge is required, see recommended charging
methods.
12.Insulate the vapor service valve and exposed line leaving
the outdoor unit. This will eliminate the outdoor sensor
picking up fals e heat at low ambient he ating c ondi tio ns .
FIGURE 8 - OUTDOOR UNIT SHUT-OFF VALVE
2. Braze the liquid line to the liquid fitting at the outdoor unit.
Be sure to wrap the fitting body with a wet rag. Allow the
nitrogen to continue flowing .
3. Carefully remove the rubber plugs from the evaporator
liquid and v apor connections . Use caution, since the evaporator is press ur i zed.
4. Braze the liquid line to the evaporato r liquid connection. The
nitrogen sho uld now be flowing throu gh the evaporator co il.
5. Remove the grommet from the vapor con nection at the c oil.
Braze the vapor line to the evaporator vapor connection.
After the connection has cooled , replace th e grommet.
6. Protect the vapor fitt ing with a wet rag and braze t he vapor
line connection. The nitrogen flow should be exiting the
system from the vapor service port connection. After This
connection has cooled, remove the nitrogen source from
the liquid fitting servic e port.
7. Evacuate the vap or line, indoor coil an d the liquid line. See
"EVACUATION" at top of page 9.
8 Central Environmental Systems
ROOM THERMOSTAT
Heat pump units must use one of the specific thermostats
approved for use with these heat pump systems. The cooling
and heating anticipators are non-adjustable in these thermostat s.
The thermostat should be located about 5 ft. above the floor,
where it will be exposed to n ormal roo m air circ ulat ion . Do no t
place it on an outsid e wall or wh ere it is expos ed to the ra dian t
effect from exposed glass or appliances, drafts from outside
doors or supply air grilles.
Mount the thermostat and route the 24-volt cont rol wiring (NEC
Class 2) from the thermostat to the indoor and outdoor units.
To eliminate erratic operation, seal the hole in the wall at the
thermostat with permagum or equivalent to prevent air drafts
affec tin g t he anticipato rs in the t he r mo stat.
Route the control wiring into the outdoor unit through the hole
provided. Connect the control wiring, see Figur e 3 T ypical Field
Wiring.
Page 9
EVACUATION
It will be necessary to evacuate the system if the unit has
developed a lea k during shipment or was, for any other rea son,
opened to the atmosphere. If a leak is suspected, leak test to
locate the leak. Repair the leak and test again .
515.26-N1Y
NOTE: The charge for pre-charged lines should be included
in the system charge s hown on the data plat e but need
not be added to the system. If sweat connect lin es are
used, the line charge over 15 feet should be included
on the data plate an d must be added t o the system.
WARNING:Never attempt to repair any brazed connections
while the system is under pre ssure. Personal injury
could result .
To verify if the system has no leaks, simply close the valve to
the vacuum pump suction to isolate the pump and hold the
system under vacuum. Watch the micron guage for a few
minutes. If the micron gauge indic ates a steady and continuous
rise, it’s an in dicat ion of a leak. If the gauge shows a rise, then
levels off after a few minutes and remains fairly constant, its an
indication that the sys tem is leak free but still c ontains moi sture
and may require further evacation if the reading is above 500
microns.
SYSTEM CHARGE
The factory charge in the outdoor unit is listed in Table 3 and
includes eno ugh charge for the unit and mat che d in door coils.
Sweat connect units also include sufficient charge for 15 feet
of lines. Pre-charge d line len gt hs a re fa ctory charged with the
correct amount of refrigerant requi red.
Sweat connect ins talla tions over 15 f eet long and s ome in door
coil matches may require some add itiona l charge . Table 4 lis ts
the amount of any additional refrig erant required for line lengths
over 15 feet.
The “TOTAL SYSTEM CHARGE” must be permanently
stamped on the unit dat a plat e.
TABLE 4 - REFRIGERANT LINE CHARGES
LIQUID OD VAPOR OD
5
⁄16“
5
⁄16“
5
⁄16“
5
⁄8” 0.44
3
⁄4” 0.46
7
⁄8” 0.48
Total system charge is determined as follows:
1. Determi ne the out door unit charge from Table 3.
2. Determine ind oor co il adju stment f rom Table 3.
3. Calculat e t he line charge wit h th e fact ors in Table 4.
a) Calculate total length of pre-charged lines for quick
connect units.
b) Calculate over 15 feet of sweat lines for sweat connec t
units.
R-22 CHARGE
OZ./FT.
4. Total system charge = item 1 + item 2 + item 3.
5. Permanently stamp the unit data plate with the total amount
of refrigerant in the system.
Use the following chargi ng method whenever additional refrigerant is required for the system charge.
CAUTION: Refrigerant charging should only be carried out by
a qualified air condi tioning contractor.
Measurement Method
A calibrated charging cylinder or accurate weighing device
must be used to add refrigerant .
Check flare c aps o n service p orts to be sure the y are l eak tig ht.
DO NOT OVERTI GHTEN (bet ween 40 and 60 inch-lbs . maximum).
OWNER’S INSTRUCTI ON
Assist owner with processing warranty cards. Review User’s
Information Manual and prov ide a copy for the owner guidance
on proper operation and maintenance. Instruct the o wner or the
operator how to start, stop and adjust temperatu re setting. The
owner should also be instructed about the 5 minute off cycle
timer and the defrost op erat ion .
When applicable, instruct the owner that the compressor is
equipped with a crankcase heater to prevent the migration of
refrigerant to the compressor during the “OFF” cycle. The
heater is energized only when the uni t is not running. If the main
switch is disconnected for long periods of shut down, do not
attempt to start the unit for 8 hours after the switch has been
connected. This will allow suf ficient time for all liquid refrigerant
to be driven out of the compressor .
The installer should also ins truct the owner on proper operation
and maintenan ce of all other s yst em compon ent s .
Central Environmental Systems 9
Page 10
515.26-N1Y
WHEN THE SYSTEM IS FUNCTIONING PROPERLY AND
THE OWNER HAS BEEN FULLY INSTRUCTED, SECURE
THE OWNER’S APPROV AL.
INDICATIONS OF PROPER OPERATIO N
COOLING
Cooling operation is the same as any conventional air condi-
tioning unit.
1. The outdoor fan should be running, with warm air being
discharged f rom the t op of the unit .
2. The indoor blower (furn ace or air handler) will be op erating,
discharging cool air from the ducts.
3. The vapor line at the outdoor unit will feel cool to the touch.
4. The liquid line at the outdoo r unit will feel warm to the touch.
WITH POWER TO UNIT AND THERMOSTAT IN
COOLING
POSITION.
1. Reversing valve is energized through thermostat system
switch to pos ition refrige rant circ uit for cool ing opera tion. In
the cooling cycle, discha rge gas is pumped to the outdoor
coil which is t he co ndens er. The indo or c oil is the e vap orator.
2. If fan switch is in “ON” position, a circuit is made through
blower relay to provide con ti nuou s blower opera ti on.
3. When thermostat cooling contact closes, a circuit is made
to energize cont acto r and start the syst em, if the compressor has been off 5 minutes. With fan switch in “AUTO”
position, a circuit is made from thermostat cooling contact
through blower relay to provide blower operation.
HEA TING
Indications of proper Heating operation is as follows:
1. The outdoor fan should be running, with cool air being
discharged f rom the t op of the unit .
2. The indoor blower (furn ace or air handler) will be op erating,
discharging warm air from the duc t s.
3. The vapor line at the outdoor unit will feel warm to the touch.
4. The liquid lin e at the out door un it will feel c ool to the touch .
SYSTEM OPERATION
See Figure 9 to trace the flow of refrigerant t hrough the system.
COOLING CYCLE FLOW
HEATING CYCLE FLOW
* SHOWN IN COOLING POSITION
4. System will cycle with thermostat demand to pro vide cooling as needed.
WITH POWER TO UNIT AND THERMOSTAT IN
HEATING
POSITION
1. Reversing valve is de-energized to position refrigerant
circuit for heat ing operation. In the hea ting cycle, disch arge
gas is pumped to the indoor coil which is the condenser.
The outdoor coil is the evaporator.
2. If fan switch is in “ON” position, a circuit is made through
blower relay to provide con ti nuou s blower opera ti on.
3. When first stage of thermostat heating contact closes, a
circuit is made through the control to energize contactor
FIELD CONNECTED LI NE
4-WAY
REVERSING
VALVE*
INDOOR
COIL
OUTDOOR
COIL
SUCTION
ACCUM.
CAPILLARY TUBE
EXPANSION DEVICE
FIGURE 9 - HEAT PUMP FLOW DIAGRAM
10 Central Environmental Systems
COMPRESSOR
STRAINER
FI L T ER/ DRI ER-CHE CK VA L V E
FLOW
CONTROL
DEVICE
FIELD CONNECTED LI NE
Page 11
and start the system, if the compressor has been off 5
minutes. With fan switch in “AUTO” position, a circuit is
made from thermostat heating contact through blower relay
to provide blower opera tion.
4. The system will cycle in response to thermostat signal to
provide heating as needed.
5. Supplemental electric heaters are energized by second
stage of heating ther mo stat.
TEST PINS
The test pins labeled “s pee d-up” and “d ef ros t” are p rov ided to
aid in field servicing of the E*FB heat pump. See Figure 10.
The pins are designed to be temporarily short ed together either
by a screwdriver or with a 1/4" fema le sp ade conne ct or.
When the “speed-up” pins are shorted together, ALL timings
are speeded up by a factor of 64. This reduces the anti-rec ycle
compressor timer from 5 minutes to about 5 seconds and the
defrost terminate time from 14 minutes to 13 seconds: additionally, the 39 minute minimum run time would be shorteded
to about 40 s econds or less if the sy stem has operated for some
period of time since last def ros t .
515.26-N1Y
temperature. Thi s could cause a lockout due to high dis charge
pressure!
NOTE: Anytime the “defrost” shorting pins are jumpered, it
automatically resets all timing cycles. After a power
failure, all timing cycles would also reset except one
that is the 5 minute d elay for compres sor rest art. It can
be reduced, however, by jumpering the “speed-up”
pins on the control board.
DEFROST CYCLE
Frost and ice which forms on the outdoor c oil during the heating
cycle must be def ros ted wh en it bloc ks t he air flow t hroug h the
coil.
Due to the arrangement of the refrigerant circuit within the
outdoor coil of these units, frost may accumulate unevenly in
different sections of the coil. However, a normal defrost may
occur even though the coil is not complete ly covered with frost.
Three requirements must be met before a defrost cycle c an be
initiated.
1. A minimum of 39 minutes must have elapsed since last
defrost.
SPEED-UP
TEST PINS
DEFROST
TEST
PINS
FIGURE 10- DEFROST TEST PIN S
When the “defrost” pins are shorted together, the control will
allow the unit to go into a defrost cycle if the compressor is
operating. When the short is removed, the heat pump will
remain in defrost until the coil temperature reaches 75° or 14
minutes expires.
2.
The liquid line temperat ure mus t be less than 40°F.
3. The coil temperature must be below the defrost initiation
temperat ure for 4. 5 minut e s cont inuously.
NOTE: Under certain low ambient conditions normal trigger-
ing of a defrost cycle could be prevented. Therefor e as
a precautio nary me asure a “Forced Defro st” is in i tia te d
every six hours to insure comp ressor longevity by returning oil back to the sump.
Defrost will terminate when the coil temperature rea ches 75 °F
or after 14 minutes defr ost time.
LOCK-OUT CONTROL
If the discharge pre ssure r eaches 400 PSIG, du ring e it her t he
heating or cooling mode, a lock-out will occur. A lock-out will
turn on the emergency heat light on the th ermostat.
Turnin g the thermostat switch to “off” then back to “on” will reset
the system.
OPERA TI ON IN EMERGEN CY HEAT POSITION
When switch on thermos t at is plac ed in emergenc y heat posi-
tion:
1. Emergency light is energized.
If the liquid (coil) temperature happens to be above 75°F, th e
short must be maintained to keep the unit in a defrost cycle. It
should be not ed that caution shoul d be used sinc e the unit
REMAIN in def rost unit l th e sho rt is re move d regard les s of coil
Central Environmental Systems 11
WILL
2. Compr ess or circuit is lo ck ed out.
3. Supplemental and standby heaters (if installed) will be
controlled by first st age of hea ti ng thermos t at .
Page 12
4. Indoor blower will operate on de mand for heat and cycle off
with the last heater element when in “AUTO” position.
before rinsing with clean water. Solution should not be
permitted to come in contact with painted surfaces.
MAINTENANCE
1. Dirt should not be allowed to accumulate on the outdoor
coils or other parts in the air circuit. Clean as often as
necessary to keep the unit clean. Use a brush, vacuum
cleaner attac hment , or other s uit abl e me ans .
2. The outdoor f an mo to r is p ermanen tly lubric at ed and do es
not require periodic oiling.
3. If the coil needs to be cleaned, it should be washed with
Calgon Coilclean (mix one part Coilclean to seven parts
water). Allow solution to remain on coil for 30 minutes
NOTICE TO OWNER:
If lockout occurs, check the followi ng befo re calli ng a servic eman:
1. Indoor sec tio n for dirty filter .
2. Outdoor section f or snow ac cu mul ation.
3. Outdoor section f or lea f or debris bloc kage.
Eliminate problem, turn off the thermostat for 10 seconds and
attempt start. Wait 5 minutes. If system does not start, call
serviceman.
P.O. Box 1592, York, Pennsylvania USA 17405-1592
Subject to change without notice. Printed in U.S.A.
Official Sponsor
of the 1992
U.S. Olympic Team
36USC380
Loading...