Bard WH301D, WH361D heat pump Installation instructions

 Bard Manufacturing Company
Bryan, Ohio 43506
Since 1914...Moving ahead, just
as planned.
Manual :
Supersedes:
File:
Date:
2100-357
Volume IH Tab 17
07-08-99
© Copyright 1999
Wall Mount General Information ........mm==>=mrsesezanneso 2
Wall Mount NomenciatuUre ...........w.e.-.ww=evesarvene 2
Shipping Damage ................eeniservorirucacannariineocenonnes 5
General — ..........eeseanirerooreo enana cara cane rneenoeceneas 5
Duct Work ............e..rrnermeciocaoeravenrcoraracareoaceneiman eras 5
Filters — ree..eceorerirerenoenevencorernroreneacucete ren ciaren recono
Fresh Air IntaKe ..................<..e-eicecezcacaoniooneracencoo venenos 6
Condensate Drain .................ercceveccrerirocrcuncanvevevennecos 6
instaliation instructions ...... 7
Wali Mounting Information rer rer rn Eee REG HE 7
Mounting the Unit ..........e-......e-sceceninsenar cananea enano 7
Typical instaliations ...................e-ererreczocasecarvenventacone 7
Top Outlet Only .................w..emmmnnenanennrin 7 с.
Wiring — Main Power ....................orecezoneoneraencon IT
Wiring — Low Voitage Wiring ...........+...«emrecereenenacanoos 11...
Thermostat indicator Lamps .....i.....er-e.eseconervenna Lee 12°
Emergency Heat Mode... Nn EEE 12
Compressor Maifunction Light ...............——.-.—e.ee...... 12
Figures
Figure 1 Unit Dimensions ................e.e.nmrercacuaconanos 3
Figure2 Blower Damper Assembly ...................... 6
Figure 3 Mounting Instructions ..............——e— «ev... 8
Figure 3A Electric Heat Ciearance ............—.—.ew=..... 8
Figure 4 Wall Mounting Instructions ................—.. 9
Figure 5 Wali Mounting instructions ...................... 9
Figure 6 Common Wall Mounting
INStRUCLIONS ….......….œ……cccoccsesosenercessansanrre 10
Figure 7 Unit 24V Terminal Board ....................... 11
Figure8 Start Up Label .................ecesemmennerennnónees 13
Figure9 Defrost Controi Board ......................... 15
Figure 10 Fan Blade Setting Dimensions .............. 18
Start Up .....
Important instalier Note................... esiraoonconcemareconaeas
Crankcase Heaters .................—..e.—e.0m0ricivecanconecoras
Service HintS ……...…….…aerrererssenenesasressassentenencanens
Sequence of Operation .................e......... ascsaracsannene
Pressure Service Ports enecocineroorammanearoneneta
Defrost Cycle ..............enm1e=mrecrrearoneccccnenoccnoororeeconne.
Troubleshooting
Solid State Heat Pump Control
Troubleshooting Procedure ................e.. meseros
Checking Temperature Sensor
Outside Unit Circuit ...................eeesscsmeiverercaverreneneas
Temperature vs. Resistance of
Temperature Sensor Chart................e......esvercerovenas
- Fan Blade Setting Dimension ...............—.— e...
— Tables
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Tabie 7
Tabie 8
Table 9
Table 10
Table 11
Table 12
Table 13
— “Removal of Fán Shroud .............——.—e.e..eneeeees
Refrigerant ChAFGE .…….…..…………rreriseenmencanensennsensse
Electric Heat Table 2
Electrical Specifications .................—e—... 4
Thermostat Wire Size 12
Wali Thermostats ess 12
Troubleshooting e... 16
Fan Blade Dimensions .......................... 18
Suction Line Temperatures ................. 18
Recommended Operating Ranges........ 18
indoor Blower Performance .............. 18
Maximum ESP of Operation
Electric Heat Only .................... eee... 19
Pressure Table - Cooling 19
Pressure Tabie - Heating .................... 20
Optional Accessories ...................ervervaio. 20
13
13
13
13
13
14
14
16
Other Inf
These publications can help you install the air conditioner or
heat pump. You can usually find these at your local library or
purchase them directly from the publisher. Be sure to consult
current edition of each standard.
National Electrical Code .................——.......... ANSINFPA 70
Standard for the Installation .................—... ANSUNFPA 90A
of Air Conditioning and
Ventilating Systems
Standard for Warm Air ……….…rrccerrrsser ANSI/NFPA 90B
Heating and Air
Conditioning Systems
Load Calculation for ....... ….. ACCA Manual J
Residential Winter and
Summer Air Conditioning
Duct Design for Residential ...................... ACCA Manual D
Winter and Summer Air
Conditioning And Equipment Selection
For more information, contact these
publishers:
ACCA — Air Conditioning Contractors of America
1712 New Hampshire Ave. N.W,
Washington, DC 20009
Telephone: (202) 483-9370
Fax: (202) 234-4721
ANSI — American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: (212) 642-4900
Fax: (212) 302-1286
ASHRAE --- American Society of Heating Refrigerating and
Air Conditioning Engineers, Incorporated
1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: (404) 636-8400
Fax: (404) 321-5478
NFPA — National Fire Protection Association
Batterymarch Park
Р.О. Вох 9101
Quincy, MA 02269-9901
Telephone: (800) 344-3555
Fax: (617) 984-7057
Manufactured under the following U.S. patent numbers:
5,485,878;5,301,744; 5,002,116; 4,924,934; 4,875,520; 4,825,936:
4,432,409
Manual 2100-357
Page 1
Mount
Heat Pump Wall Mount Model Nomenclature
MODEL NUMBER CONTROL MODULES
\ WH 30 1 D A 1 0 Y X X Xx Y B (See Chart Below
capot и \
30 — 2.1/2Ton REVISION COIL OPTIONS
36 — 3 Ton X — Standard
1 — Phenolic Coated Evaporator
VENTILATION OPTIONS 2 — Phenolic Coated Condenser
DEHUMIDIFICATION X — Barometric Fresh Air Damper 3 — Phenolic Coated Evaporator
VOLTS & PHASE (Standard) and Condenser
A — 230/208/60-1 B — Blank-off Plate COLOR OPTIONS
X - Beige (Standard)
B — 230/208/60-3 KW
C — 460/60-3 00—- No KW Y - Commercial Room Ventilator -
05 — 5 KW Motorized with Exhaust
06 — 6KW E ~ Economizer {intemal} - Fully
09 — 9 KW Modulating with Exhaust
10 — 10 KW В - Energy Recovery Ventilator -
16 — 15KW Motonzed with Exhaust
M- Motorized Fresh Air Damper
1 —White
2 — Mesa Tan
3 ~ Colonial White
à —Buckeye Gray
FILTER OPTIONS
QUTLET OPTIONS
X — Front (Standard)
T~ Top
X - One inch Throwaway
(Standard)
W — One Inch Washable
P - Two Inch Pleated
NOTE: For OKW and circuit breakers (230/208 V) or pull disconnects (460 V) applications, insert 0Z in the KW field of model number.
— TABLE 1 — ELECTRIC HEAT TABLE
Models WH301DA WH301DB WH301DC WH361DA WH361DB WH361DC
240-1 208-1 240-3 ‘2084 460-3 240-1 208-1 240-3 208-3 460-3
KW À | BTU | A | ВТО | À | BTUI A } BTU | À | ВТО | А | BTU | À [| BTU | À | BTU | A | BTU! A | BTU
5 20.8] 17065] 18.1} 12800 20.81 17065 | 18.1} 12800
10 141.67 341301 36.2 | 25600 41.6 | 34130 | 36.21 25600
15 62.51 51200] 54.1} 38400
6 14.4 | 205004 12.5) 1536801 72 | 20480
9 21,71 30600 | 18.71 230301 10.8 1 30700 21.71 306001 18.7 123030 1 10.8] 30700
Manual 2100-357
Page 2
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2100-357
Manual
Page 3
TABLE 2 — ELECTRICAL SPECIFICATIONS
SINGLE CIRCUIT DUAL CIRCUIT
a O @ @ © ® © ©
Maximum
‘ Minimum External
Maximum - : ;
rates | No Extemat | Fila potter | Torr | eg oe
Volts Field | Minimum | Fuse or | Power | Ground Р
and Power] Circuit Circuit | Wire Wire
Model Phases | Ckts. | Ampacity | Breaker ! Size Size | Ckt À| Ckt B | Ckt À | Cki 8 | Ckt À | Ckt B{ Ckt Ai Ci B
WH301DA00, AOZ 1 24 35 8 19 N/A N/A N/A N/A N/A N/A N/A N/A
© AOS 230/208-1 1 50 50 8 10 N/A N/A N/A N/A N/A N/A N/A N/A
- A10 1 76 80 4 8 50 26 50 30 8 10 10 10
WH301DB00, BOZ 1 19 25 10 10 N/A | N/A | N/A | NA | NA | NA {| NA | NA
B06 | 230/208-3 1 37 40 8 10 N/A N/A N/A N/A N/A N/A N/A N/A
© Bo 1 46 50 8 10 N/A | N/A | NA | NA | N/A | N/A | N/A | N/A
WH301DC00, COZ 1 10 15 14 14 N/A N/A N/A N/A N/A N/A N/A N/A
Coe] 460-3 1 19 20 12 12 N/A N/A N/A N/A N/A N/A N/A N/A
© Cos 1 24 25 10 10 N/A | N/A | NA | NA | NA | NA | N/A | NA
WH361DA00, AOZ 1 27 40 10 10 N/A NA N/A N/A N/A N/A N/A N/A
A051 230/208-1 1] 1072 53 60 6 10 N/A N/A N/A N/A N/A N/A N/A N/A
@ A10 1072 79 80 4 8 53 26 60 30 5 10 10 10
WH361DB00, BOZ 1 20 25 10 10 N/A N/A N/A N/A N/A N/A N/A N/A
B06 | 230/208-3 1 38 40 8 10 N/A N/A N/A N/A N/A N/A N/A N/A
© Bos 1 47 50 8 10 NA | NA | NA | NA | NA | NA | NA | NA
WH361D C00, COZ 1 11 15 14 14 N/A N/A N/A N/A N/A N/A N/A N/A
COB; 460-3 1 20 20 i2 12 N/A N/A N/A N/A NA | NA N/A N/A
O Cos 1 25 25 10 10 | NA | NA | NA | NA | NA | NA | NA | NA
D Maximumsize of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.
@ Based on 75°C copper wire. All wiring must conform to NEC and all local codes.
@
Maximum KW that can operate with heat pump on.
@ These Minimum Circuit Ampacity" values are to be used for sizing the field power conductors. Referto the
National Electrical Code {latest version), article 310 for power conductor sizing. CAUTION: When more than one field
power conductor circuit is run through one conduit, the conductors must be derated. Pay special attention to
®
note 8 of table 310 regarding Ampacity Adjustment Factors when more than 3 conductors are in a raceway.
Not available in top outlet version.
Manual
Page 4
2100-357
SHIPPING DAMAGE
Upon receipt of equipment, the carton should be checked for
external signs of shipping damage. If damage is found, the
receiving party must contact the last carrier immediately,
preferably in writing, requesting inspection by the carrier’s
agent.
GENERAL
The equipment covered in this manual is to be installed by
trained, experienced service and installation technicians.
The refrigerant system is completely assembled and charged.
All internal wiring is complete.
The unit is designed for use with or without duct work.
Flanges are provided for attaching the supply and return
ducts.
These instructions and any instructions packaged with any
separate equipment required to make up the entire heat -
pump system should be carefully read before beginning the
installation. Note particularly “Starting Procedure” and any
tags and/or labels attached to the equipment.
While these instructions are intended as a general
recommended guide, they do not supersede any national
and/or local codes in any way. Authorities having
Jurisdiction should be consulted before the instaliation is
made. See Page 1 for information on codes and standards.
Size of unit for a proposed installation should be based on
heat loss calculation made according to methods of Air
Conditioning Contractors of America (ACCA). The air duct
should be installed in accordance with the Standards of the
National Fire Protection Association for the Installation of
Air Conditioning and Ventilating Systems of Other Than
Residence Type, NFPA No. 90A, and Residence Type Warm
Air Heating and Air Conditioning Systems, NFPA No. 90B,
Where local regulations are at a variance with instructions,
installer should adhere to local codes.
DUCT WORK
Any heat pump is more critical of proper operating charge
and an adequate duct system than a straight air conditioning
unit, All duct work, supply and return, must be properly
sized for the design air flow requirement of the equipment.
Air Conditioning Contractors of America (ACCA) is an
excellent guide to proper sizing. All duct work or portions
thereof not in the conditioned space should be properly
insulated in order to both conserve energy and prevent
condensation or moisture damage.
Refer to Table 10 for maximum static pressure available for
duct design.
Design the duct work according to methods given by the Air
Conditioning Contractors of America (ACCA). When duct
runs through unheated spaces, it should be insulated with a
minimum of one inch of insulation. Use insulation with a
vapor barrier on the outside of the insulation. Flexible joints
should be used to connect the duct work to the equipment in
order to keep the noise transmission to a minimum.
À 1/4 inch clearance to combustible material for the first
three feet (3) of duct attached to the outlet air frame is
required. See Wall Mounting Instructions and Figures 3,
3A, 3B, and 3C for further details.
Ducts through the walls must be insulated and all joints
taped or sealed to prevent air or moisture entering the wall
cavity.
Some installations may not require any return air
duct. A metallic return air grille is required with
installations not requiring a return air duct. The
spacing between louvers on the grille shall not
be larger than 5/8 inches,
Any grille that meets the 5/8 inch louver criteria, may be
used, It is recommended that Bard Return Air Grille Kit
RG-2 thru RG-5 or RFG-2 thru RFG-5 be installed when no
return duct is used. Contact distributor or factory for ordering
information. If using a return air filter grille, filters must be
of sufficient size to allow a maximum velocity of 400 fpm.
NOTE: If no return air duct is used, applicable installation
codes may limit this cabinet to installation only in a
single story structure.
Filters
A 1inch throwaway filter is supplied with each unit. The
filter slides into position making it easy to service. This filter
can be serviced from the outside by removing the service
door. A 1 inch washable filter and 2 inch pleated filter are
also available as optional accessories. The internal filter
brackets are adjustable to accommodate the 2 inch filter by
bending down the tabs to allow spacing for the 2 inch filters.
Manual 2100-357
Page 5
Fresh Air Intake
All units are built with fresh air inlet slots punched in the
service panel.
If the unit is equipped with the fresh air damper assembly,
the assembly is shipped already attached to the unit. The
damper blade is locked in the closed position. To allow the
damper to operate, the maximum and minium blade position
stops must be installed. See Figure 2.
All capacity, efficiency and cost of operation information as
required for Department of Energy “Energyguide” Fact
Sheets is based upon the fresh air blank-off plate in place
and is recommended for maximum energy efficiency.
The blank-off plate is available upon request from the
factory and is installed in place of the fresh air damper
shipped with each unit.
Condensate Drain
A plastic drain hose extends from the drain pan at the top of
the unit down to the unit base. There are openings in the
unit base for the drain hose to pass through. In the event the
drain hose is connected to a drain system of some type, it
must be an open or vented type system to assure proper
drainage.
FIGURE 2 - BLOWER DAMPER ASSEMBLY
BLADE IS LOCKED
CLOSED FOR
SHIPPING
Mi5-838
Manual 2100-357
Page 6
TUN,
WALL MOUNTING INFORMATION
1. Two holes, for the supply and return air openings, must be
cut through the wall as shown in Figure 3.
2. On wood-frame walls, the wall construction must be
strong and rigid enough to carry the weight of the unit
without transmitting any unit vibration. See Figures 4
and 5.
Fire hazard can resuit if 1/4 inch clearance to
combustible materials for supply air duct is not
maintained. See Figure 3.
3. Concrete block walls must be thoroughly inspected to
insure that they are capable of carrying the weight of the
installing unit. See Figure 4.
MOUNTING THE UNIT
1. These units are secured by wall mounting brackets which
secure the unit to the outside wall surface at both sides. A
bottom mounting bracket is provided for ease of
installation, but it is not required.
2. The unit itself is suitable for “0” inch clearance, but the
supply air duct flange and the first 3 feet of supply air
duct require a minimum of 1/4 inch clearance to
combustible material. If a combustible wall, use a
minimum of 28-1/2" x 8 -1/2" dimensions for sizing,
However, 1t 1s generally recommended that a 1 inch
clearance is used for ease of installation and maintaining
the required clearance to combustible material. The
supply air opening would then be 30" x 10". See
Figures 3, 4 and 7 for details.
Failure to provide the 1/4 inch clearance
between the supply duct and a combustible |
surface for the first 3 feet of duct can result in -
fire.
3. Locate and mark lag bolt locations and bottom mounting
bracket location, if desired. See Figure 4.
4. Mount bottom mounting bracket, if used.
5. Hook top rain flashing under back bend of top. Top rain
flashing is shipped secured to the right side of the back.
6. Position unit in opening and secure with 5/16 lag bolts;
use 3/4 inch diameter flat washers on the lag bolts.
7. Secure rain flashing to wall and caulk across entire length
of top. See Figure 3.
8. For additional mounting rigidity, the retum air and supply
air frames or collars can be drilled and screwed or welded
to the structural wall itself (depending upon wall
construction). Be sure to observe required clearance if
combustible wall.
9. On side by side installations, maintain a minimum of 20
inches clearance on right side to allow access to heat
strips and control panel, and to allow proper airflow to the
outdoor coil. Additional clearance may be required to
meet iocal or national codes.
TYPICAL INSTALLATIONS
See Figure 6 for common ways to install the wall-mount
unit,
Manual 2100-357
Page 7
~ FIGURE 3
MOUNTING INSTRUCTIONS
NOTE: His recommended that a bead of silicone
caulking be piaced behind the side mounting flanges and
SEAL ETRE SEAD CF CHALKING
A B ED PE ALGU ENTIRE (ЕНОТ OF TOP.
REQUIRED DIMENSIONS TO MAINTAIN | 28 1/2 | 84/2 | 51/4 1313/16 / 17 5/8 PE
1/4” WIN. CLEARANCE FROM Te
CONBUSTISLE MATERIALS
REQUIRED GIMENSIONS TO WAINTAIN | 3 1 141 ial 16 7/8
RECOMMENDED 1" CLEARANCE РАСЫ FOAY AIR SEAL
COMBUSTIBLE MATERIALS
HALL
/ | MALL STRUCTURE
r
Pal 1/4" CLEARANCE ON ALL
— poo A m po ve FOUR SIDES OF SUPPLY
AIR DUCT 15 REQUIRED
| — и FROM COMBUSTABLE
MATERIALS
NET
1 8 DN “SUPPLY AIR DUCT 3
12.000
- |
!
12.088 | |
—— Ш Ш
и T REN MR >
| 5 1/2 mo Fagen 28,000 ———— a
12.000
87
4.000 TYP..
12.08 +008 7 3.000 B75 3.125
PY re 4.000 TYP. | |
} | + : - , я | ” , = , " . il;
ГС о
— 412 417 no
MIS-311
FIGURE 3A
TYPICAL BUILDING у ELECTRIC HEAT CLEARANCE
QUISIOE SHEETING N 7 WALL FRAME
7 INSIDE SHEETING
É SUPPLY
UNIT AN j "EN
a a ,
/ 14" HK. * A minimum of 1/4 inch clearance must be
SUPPLY AIR DUCT maintained between the supply air duct and
OT combustible materials. This is required for the
first 3 feet of ducting.
* |tis important to insure that the 1/4 inch
N 7 Side section view of supply air minimum spacing is maintained at all points.
uct for wall mounted unit
N duct for wall d uni , , , ,
N showing 1/4 inch clearance to e Failure to do this could resuit in overheating
N combustible surfaces. the combustible material and may resuit in
MiS-277 N fire.
Manual 2100-357
Page 8
+
FIGURE4
WALL-MOUNTING INSTRUCTIONS
SEE FIGURE 3 — MOUNTING INSTRUCTIONS Г MALL STRUCTURE
/
TACTORT SUPPLIED RAIN FLARHING
MOUNT ON LEY BET ORT
INSTALLATION
SUPPLY AIR OPOMINE . SPPLY AIR CFENNS | + IT 10 SUPPLY AL DUCT 3
RETLRK AIR РОН; . REIN Al ORIG AT ;
Г. > ; |
WOOD JOR STEER SIBING
ВОТ МОЖ INE
BRAOKET. LOUIT Di
WALL BEFORE. INSTALLING НиТ
CONCRETE BLOCK WALL INSTALLATION WOOD FRAME WALL INSTALLATION
MiS-548
FIGURE 5
WALL-MOUNTING INSTRUCTIONS
SEE UNIT DIMENSIONS, FIGURE 1,
a FOR ACTUAL DIMENSIONS
£ + 1.000
3
ATTACH 70 1CA
PLATE OF WALL
SEE FIGURE 1 FOR
DUCT DIMENSIONS
1.009" CLORAKE
ALL ANUN
SUPPLY QUE
, OPENING
INTIRIOR FINISHED BALL
OVER FRAHE
1.000" CLEARARC
МОК
EXTERIOR FINISH WALL
ATTACH 10 BOTTOM
FRAMING MATERTAL PLATE OF MALL THIS STRUCTURAL NEWER LOCATED TO
2x 48, 21 ES LO MATCH STUD SPACING FOR BEST OF BALL.
MIS-549 STRUCTURAL SIEUL À SÉCOHO NEWSER MAYBE REQUIRED FOR SOME WALLS.
Manual 2100-357
Page 9
RAIN
FLASHING
FIGURE 6
COMMON WALL-MOUNTING INSTALLATIONS
RAFTERS
NN
=
or
Te
vr
OUTSERE WALL
Ш — SUPPLY AIR DUCT W/ GRILLE
FIRISHED CEILING
SURFACE
% RETURN AIR
OPENING W/ GRILLE
FREE AIR FLOW
NO DUCT
SUPPLY DUCT MAYBE LOCATED IN AN ATTIC
OR BELOW CEILING RAFTERS AS SHOMN
RAIN
FLASHING
NN RAFTERS
ee
| SUPPLY AIR WT — ?
a
Ll Z FINISHED CEILING SURFACE
7 RETURN AIR
OUTSIDE WALL
% OPENING W/ GRILLE
DUCTED SUPPLY
RETURN AT UNIT
RAIN
FLASHING NN
SUPPLY DUCT WAYBE LOCATED IN AN ATTIC
OR BELOK CEILING RAFTERS AS SHOWN
pp —
RAFTERS >
=
ЗОРУ АЕ [37 — — {
>
И
/ FINISHED CEILING SURFACE
OUTSIDE WALL |
N— WALL SLEEVE
| I RETURN AIR SPACE
FALSE WALL
x
*
"+
Ae
3
+
RETURN AIR GRILLE
FALSE WALL INSTALLATION
SUPPLY DUCT MAYBE LOCATED IN AN ATTIC
OR BELOW CEILING RAFTERS AS SHOWN
RAIN
TAE RAFTERS "a
| EE 2
3 4 | >
| | LOWERED CEILING | | | ее
[| - SUPPLY AIR
x. GRILLE
- FINISHED CEILING
SURFACE
\ CLOSET WALL
; SF Nw
| SLEEVE
OUTSIDE MALL Le RAISED FLOOR
— RETURN AIR Ÿ RETURN AIR GRILLE
MIS-550
Manual 2100-357
Page 10
TTT
WIRING — MAIN POWER
Refer to the unit rating plate for wire sizing information
and maximum fuse or “HACR" type circuit breaker size.
Each outdoor unit is marked with a “Minimum Circuit
Ampacity”. This means that the field wiring used must be
sized to carry that amount of current. Depending on the
installed KW of electric heat, there may be two field power
circuits required. If this is the case, the unit serial plate will
so indicate. All models are suitable only for connection
with copper wire. Each unit and/or wiring diagram will be
marked “Use Copper Conductors Only”. These
instructions must be adhered to. Refer to the National
Electrical Code (NEC) for complete current carrying
capacity data on the various insulation grades of wiring
material. All wiring must conform to NEC and all local
codes.
The electrical data lists fuse and wire sizes (75°C copper)
for all models, including the most commonly used heater
sizes. Also shown are the number of field power circuits
required for the various models with heaters.
The unit rating plate lists a “Maximum Time Delay Relay
Fuse” or “HACR" type circuit breaker that is to be used
with the equipment. The correct size must be used for
proper circuit protection and also to assure that there will
be no nuisance tripping due to the momentary high starting
current of the compressor motor.
~The disconnect access door on this unit may be locked to
. prevent unauthorized access to the disconnect. To convert for
the locking capability, bend the tab located in the bottom left
hand comer of the disconnect opening under the disconnect
access panel straight out. This tab will now line up with the
slot in the door. When shut, a padlock may be placed through
the hole in the tab preventing entry,
WIRING — LOW VOLTAGE WIRING
230/208V, 1 phase and 3 phase equipment dual primary
voltage transformers. All equipment leaves the factory wired
on 240V tap. For 208V operation, reconnect from 240V to
208V tap. The acceptable operating voltage range for the 240
~~ and 208V taps are:
Tap Range
240 253 - 216
208 220 - 187
В NOTE: The voltage should be measured at the field power
connection point in the unit and while the unit is
operating at full load (maximum amperage
operating condition).
- Nine (9) wires should be run from thermostat subbase to the
24V terminal board in the unit. A nine conductor, 18 gauge
copper, color-coded thermostat cable is recommended. The
connection points are shown in Figure 7.
FIGURE 7
UNIT 24V TERMINAL BOARD
pur оо о-
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FACTORY
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IMPORTANT NOTE:
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Only the thermostat and subbase combinations as shown above and in Table 4 will work with this
equipment. The thermostat and subbase must be matched and the correct operation can be assured
only by proper selection and application of these parts.
Manual 2100-357
Page 11 |
TABLE 3
THERMOSTAT WIRE SIZE
3 Maximum
Transformer Distance
VA | FLA Wire Gauge | In Feet
20 gauge 45
18 gauge 60
55 2.3 16 gauge 100
| 14 gauge 160
12 gauge 250
TABLE 4
WALL THERMOSTATS
Thermostat Predominant Features
8403-042
1 stage cool; 2 stage heat
Electronic Non-Programmable
(1851 1 G1 070) Auto or-Manual changeover
Robertshaw
300-227
2 stage cool; 3 stage heat
7 Day Programmable |
Auto or Manual changeover
Enerstat
. SHP-2
2 stage cool; 3 stage heat
7 Day Programmabie
Auto or Manual changeover
THERMOSTAT INDICATOR LAMPS
The red lamp will come on if there is any problem that: =
prevents the compressor from running when it is supposed
to be.
EMERGENCY HEAT MODE
The operator of the equipment must manually place the
system switch in this position. This is done when there is a
known problem with the unit, or when the red lamp comes
on indicating a problem.
COMPRESSOR MALFUNCTION LIGHT
~*~ Actuation of the red [amp is accomplished by a relay output
from the heat pump control board which is factory installed.
Any condition such as loss of charge, high head pressure,
etc., that will prevent compressor from operation will cause
red lamp to activate. This is a signal to the operator of the
equipment to place system in emergency heat position.
‘Manual 2100-357
Page 12
и
Start Up
IMPORTANT INSTALLER NOTE
For improved start-up performance, wash the indoor coil
with a dishwashing detergent.
CRANKCASE HEATERS
All units are provided with some form of compressor
crankcase heat.
All single and three phase models have an insertion well-
type heater located in the lower section of the compressor
housing. This is a self-regulating type heater that draws only
enough power to maintain the compressor at a safe
temperature,
Some form of crankcase heat i is essential to prevent liquid
refrigerant from migrating to the compressor, causing oil
pump out on compressor start-up and possible valve failure
due to compressing a liquid.
The decal in Figure 8 is affixed to all outdoor units detailing
start-up procedure. ‘This i is very important. Please read
carefully. В
SERVICE HINTS
1. Caution homeowner to maintain clean air filters at all
times. Also, not to needlessly close off supply and retum
air registers. “This reduces air flow through the system,
which shortens equipment service life as well as
increasing operating costs.
2. Switching to heating cycle at 75° F or higher outside
temperature may cause a nuisance trip of the remote reset
high pressure switch, Turn thermostat off, then on to
reset the high pressure switch.
3. The heat pump wall thermostats perform multiple
functions. Be sure that all function switches are correctly
set for the desired operating mode before trying to
diagnose any reported service problems.
4. Check all power fuses or circuit breakers to be sure they
are the correct rating.
5. Periodic cleaning of the outdoor coil to permit full and
unrestricted airflow circulation is essential.
SEQUENCE OF OPERATION
COOLING ~ Circuit R-Y makes at thermostat pulling in
compressor contactor, starting the compressor and outdoor
motor. The G (indoor motor) circuit is automatically
completed on any call for cooling operation or can be
energized by manual fan switch on subbase for constant air
circulation.
FIGURE 8
START UP LABEL
IMPORTANT
THESE PROCEDURES MUST
BE FOLLOWED AT INITIAL
START UP AND AT ANY TIME
POWER HAS BEEN REMOVED
FOR 12 HOURS OR LONGER.
TO PREVENT COMPRESSOR DAMAGE
WHICH MAY RESULT FROM THE PRES-
ENCE OF LIQUID REFRIGERANT IN
THE COMPRESSOR CRANKCASE:
1. MAKE CERTAIN THE ROOM THERMO-
STAT IS IN THE “OFF” POSITION, (THE
COMPRESSOR IS NOT TO OPERATE.)
2. APPLY POWER BY CLOSING THE SYS-
TEM DISCONNECT SWITCH. THIS EN-
ERGIZES THE COMPRESSOR HEATER
~ WHICH EVAPORATES THE LIQUID RE-
FRIGERANT IN THE CRANKCASE.
3. ALLOW 4 HOURS OR 60 MINUTES PER
POUND OF REFRIGERANT IN THE SYS-
TEM AS NOTED ON THE UNIT RATING
PLATE, WHICHEVER IS GREATER,
4. AFTER PROPER ELAPSED TIME THE
THERMOSTAT MAY BE SET TO OPER-
ATE THE COMPRESSOR.
5. EXCEPT AS REQUIRED FOR SAFETY
WHILE SERVICING, DO NOT OPEN
SYSTEM DISCONNECT SWITCH,
7961-411
HEATING —~ A 24V solenoid coil on reversing valve
controls heating cycle operation. Two thermostat options,
one allowing "Auto" changeover from cycle to cycle and the
other constantly energizing solenoid coil during heating
season, and thus eliminating pressure equalization noise
except during defrost, are to be used. On "Auto" option a
circuit is completed from R-W1 and R-Y on each heating
on” cycle, energizing reversing valve solenoid and pulling
in compressor contactor starting compressor and outdoor
motor. R-G also make starting indoor blower motor. Heat
pump heating cycle now in operation. The second option
has no "Auto" changeover position, but instead energizes the
reversing valve solenoid constantly whenever the system
switch on subbase is placed in "Heat" position, the "B"
terminal being constantly energized from R. À Thermostat
demand for heat completes r-Y circuit, pulling in compressor
contactor starting compressor and outdoor motor. R-G also
make starting indoor blower motor.
Manual 2100-357
Page 13
OCCUPIED MODE
VENTILATION SEQUENCE — The ERV and indoor
blower will be continuously energized when the timer is
energized.
COOLING SEQUENCE — On a call for cooling, the
compressor of the unit is energized to provide cooling. À
call for cooling cancels dehumidification mode. Cooling
mode is only available when the timer is energized.
HEATING SEQUENCE — On a call for heating, the
compressor and reversing valve of the unit are energized to
provide heat pump heating. If the room temperature falls
below the 2nd stage heating set point backup electric heat is
energized. Heat pump heating is only available when the
timer is energized. If heating is energized any call for
dehumidification is ignored. If dehumidification is already
energized a call for 2nd stage heating is needed to cancel
dehumidification mode.
DEHUMIDIFICATION SEQUENCE — On a call for
dehumidification the compressor and three way valve of the
unit are energized to provide denumidificatron.
Dehumidification mode will continue until the humidistat is
satisfied. If the room temperature falis below ist stage
heating setpoint, electric heat will be energized by the room
thermostat and cycle to maintain room temperature. If 2nd
stage heating setpoint is reached, dehumidification is de-
energized and heat pump heating is energized. A call for
cooling cancels dehumidification mode.
UNOCCUPIED MODE
Cooling, heating, emergency heat and ventilation are
inhibited.
DEHUMIDIFICATION SEQUENCE — On a call for
dehumidification the compressor and three way valve of the
unit are energized to provide dehumidification.
Dehumidification mode will continue until the humidistar ; is
satisfied. If the room temperature falls below 65 degrees
and dehumidification is energized, electric heat will be
energized by the return air thermostat and cycle to maintain
room temperature. a
Dehumidification mode can be deactivated during periods
when the timer is not energized by changing the connection
of the humidistat wiring in the low voltage box, a
OTHER CONTROL SEQUENCE
Any time the indoor coil temperature falls below 32 degrees
the compressor will be de-energized until the coil
temperature rises above 57 degrees.
PRESSURE SERVICE PORTS
High and low pressure service ports are installed on all units
so that the system operating pressures can be observed.
Pressure tables can be found later in the manual covering all
models on both cooling and heating cycles. It is imperative
to match the correct pressure curve to the unit by model
number.
DEFROST CYCLE
The defrost cycle is controlled by temperature and time on
the solid state heat pump control.
When the outdoor temperature is in the lower 40° F
temperature range or colder, the outdoor coil temperature is
32° F or below. This coil temperature is sensed by the coil
sensor mounted near the bottom of the outdoor coil. Once
coil temperature reaches 30° F or below, the coil sends a
signa to the control logic of the heat pump control and the
defrost timer will start,
After 60 (90 or 30) minutes at 30° F or below, the heat
pump control will piace the system in the defrost mode.
During the defrost mode, the refrigerant cycle switches back
to the cooling cycle, the outdoor motor stops, electric heaters
are energized, and hot gas passing through the outdoor coil
melts any accumulated frost. When the temperature rises to
approximately 57° F, the coil sensor will send a signal to the
heat pump control which will return the system to heating
operations automatically,
If some abnormal or temporary condition such as a high
wind caused the heat pump to have a prolonged defrost
cycle, the heat pump control will restore the system to
heating operating automatically after 10 minutes...
There is a cycle speed up jumper on the control. This can be
used to reduce the time between defrost cycle operation
without waiting for time to elapse.
There is an initial defrost (init def) jumper on the control
that can be used at any outdoor ambient during the heating
cycle to simulate a 0° coil temperature. This can be used to
check defrost operation of the unit without waiting for the
outdoor ambient to fall into the defrost region.
Manual 2100-357
Page 14
- FIGURE 9
Ш DEFROST CONTROL BOARD |
a = | = 5 5
Lin 0
rR
na
0 “
|
—— CONTROL CIRCUIT
ot
SENSOR
SPEEDUP > 0 |
I. NIT DEF 90 о
Manual 2100-357
Page 15
SOLID STATE HEAT PUMP CONTROL
TROUBLESHOOTING PROCEDURE
1. Turn on AC power supply to indoor and outdoor units.
2. Tum thermostat blower switch to fan "on" -— the indoor
blower should start. (If it doesn't, troubleshoot indoor
unit and correct problem).
4. Set system to heat or cool. Adjust thermostat to call for
heat or cool — the indoor blower, compressor, and
outdoor fan should start.
NOTE: If there was no power to 24 volt transformer, the
compressor and outdoor fan motor will not start
for 5 minutes. This is because of the compressor
short cycle protection.
3. Turn thermostat blower switch to auto position. Indoor
blower should stop.
contactor does not
energize (heating or
cooling)
and 24 volt between R - С
TABLE 5
TROUBLESHOOTING
Symptom Possible Causes What to Check How to Dheck or Repair
Comprassor Control circuit wiring Check for R connectio at unit — | Run R connection to outdoor unit to power heat
pump control.
Compressor lock out
1. Check for 24Y between
contro!
2. Check across high presure
switch.
1.
. high pressure switch is open and will not
if no voltage between L1-C, tum thermostat
off and on again to reset high pressure
switch.
reset, replace high pressure switch.
Compressor short cycle
protection
Check for 24 V between CC-C
and Y-C on heat pump control.
If not voitage between CC-C, jumper speed
up terminal, and within 10 seconds power
should appear between CC-C. Remove
speed up jumper after 10 seconds.
Heat pump contro!
detective
Check all other possible
causes. Manual 2100-065
Replace heat pump control.
Contactor defective
Check for open or shorted coil
winding.
Replace contactor.
Power phasing not
correct
Check for red LED on phase
monitor (3 phase units only).
Switch two power leds to the unit,
Fan outdoor motor
does not run
{cooling or heating
except during
defrost)
Motor defective Check for open or shorted Repiace motor.
motor winding.
Motor capacitor Check capacitor ratng. Check | Replace capacitor.
defective for open or shorted capacitor.
Heat pump contro!
defective
Check across fan relay on
heat pump contro? (Com-NC).
Replace heat pump control.
Reversing valve
does not energize
(heating only)
Reversing vaive solenoid
coil defective
Check for open or shorted coil.
Replace solenoid Coil.
Heat pump contro!
defective
Check for 24V between RV-C
and B-C.
Check control circuit wiring.
Replace heat pump control.
Unit will not go into
defrost
{heating only)
Temperature sensor or
heat pump contro!
defective
Disconnect temperature
sensor from board and jumper
across speed up terminals and
sen jump terminals. This
should caruse the unit to go
through a defrost cycle within
one minute.
1. ff unit goes through defrost cycle, replace
temperature sensor.
. If unit does not go through defrost cycle,
replace heat pump control.
Unit will not come
Temperature sensor or
Jumper across speed up
. KF unit comes out of defrost cycle replace
out of defrost heat pump control terminals. This should cause temperature sensor.
(heating only) defective the unit to come out of defrost | 2. If unit does not come out of defrost
within one minute. cycle, replace heat pump control.
Manual 2100-357
Page 16
CHECKING TEMPERATURE SENSOR
OUTSIDE UNIT CIRCUIT
1. Disconnect temperature sensor from board and from
outdoorcoil. ~~ «= © o |
3. Check resistance reading to chart of resistance. Use
sensor ambient temperature. (Tolerance of part is о
+ 10%.) М Ва
4. If sensor resistance reads very low, then sensor is shorted
E a | and will not allow proper operation of the heat pump
2. Use an ohmmeter and measure the resistance of the control. : E | SE
sensor. Also use ohmmeter to check for short or open. o | | :
a Ве 5. If sensor is out of tolerance, shorted, open or reads very -
low ohms then it should be replaced.
— TEMPERATURE F VS. RESISTANCE R OF TEMPERATURE SENSOR
AA
Page
Е В Е В Е В
-25.0 196871 25.0 39898 75.0 10501
-24.0 190099 26.0 38757 760.0 10247
-23.0 183585 27.0 37652 77.0 10000
-22.0 177318 28.0 36583 78.0 9760
-21,0 171289 29.0 35548 79.0 9526
«20.0 165487 30.0 34545 80.0 9299
-19.0 159904 31.0 33574 81.0 9077
-18.0 154529 32.0 32634 82.0 8862
-17.0 149355 33.0 31723 83.0 8653
-16.0 144374 34.0 ‚ 30840 84.0 8449
-15.0 139576 35.0 29986 85.0 8250
-14.0 134956 36.0 29157 86.0 8057
-13.0 130506 37.0 28355 87.0 7869
-12.0 126219 38.0 27577 88.0 7686
-11.0 122089 39.0. 26823 89.0 7507
-10.0 118108 40.0 20092 90.0 7334
"9.0 114272 41.0 25383 91.0 7165
-8.0 110575 42.0 24696 92.0 7000
„7,0 107010 43,0 24030 93.0 6840
-6.0 103574 44.0 23384 94.0 6683
«5.0 100260 45.0 22758 95.0 6531
-4.0 97064 46.0 22150 96.0 0383
-3.0 93981 47.0 21561 97.0 6239
-2.0 91008 48.0 20989 98.0 6098
-1.0 88139 49.0 20435 99.0 5961
0.0 85371 50.0 19896 100.0 5827
1.0 82099 51.0 19374 101.0 5697
2.0 80121 52.0 18867 102.0 5570
3.0 77632 53.0 18375 103.0 5446
4.0 75230 54.0 17898 104.0 5326
5.0 72910 55.0 17434 105.0 5208
6.0 70670 56.0 16984 106.0 5094
7.0 68507 57.0 16547 107.0 4982
8.0 66418 58.0 16122 108.0 4873
9.0 64399 59.0 15710 109.0 4767
10.0 62449 60.0 15310 110.0 4663
11.0 60565 61.0 — 14921 111.0 4562
12.0 58745 62.0 — 14544 112.0 4464
13.0 56985 63.0 14177 113.0 4367
14.0 55284 64.0 13820 114.0 4274
15.0 53640 65.0 13474 115.0 4182
16.0 52051 66.0 13137 116.0 4093
17.0 50514 67.0 12810 117.0 4006
18.0 49028 68.0 -12492 118.0 3921
19.0 47590 69.0 12183 119.0 3838
20.0 46200 70.0 11883 120.0 3757
21,0 44855 71.0 11591 121.0 3678
22.0 43554 | 72.0 11307 122.0 3601
23.0 42295 73.0 11031 123.0 3526
24.0 41077 74.0 10762 124.0 3452
Manual 2100-357
17
FAN BLADE SETTING DIMENSIONS
Shown in the drawing in Figure 10 are the correct fan blade
setting dimensions for proper air delivery across the outdoor
coil. -
Any service work requiring removal or adjustment in the fan
and/or motor area will require that the dimensions below be
checked and blade adjusted in or out on the motor shaft
accordingly.
FIGURE 10
FAN BLADE SETTING
TABLE 6
FAN BLADE DIMENSIONS
Model
Dimension A
WH301D
WH361D
125
|
|
|
|
|
|
|
|
|
REMOVAL OF FAN SHROUD
1. Disconnect ali power to unit.
ны NA
MIS-1190
2. Remove the screws holding both grilles — one on each
side of unit — and remove grilles.
3. Remove screws holding fan shroud to condense and
bottom — (9) screws.
4. Unwire condenser fan motor.
5. Slide complete motor, fan blade, and shroud assembly
out the left side of the unit. ее
6. Service motor/fan as needed.
7. Reverse steps to reinstall.
REFRIGERANT CHARGE
The correct system R-22 charge is shown on the unit rating
plate. Optimum unit performance will occur witha
refrigerant charge resulting in a suction line temperature
(6 inches from compressor) as shown in the Table 7.
TABLE 7 — SUCTION LINE TEMPERATURES
Model Rated 95 FOD 82 FOD
Airflow | Temperature | Temperature
WH301D 1000 56 -- 58 63 -- 65
WH361D 1100 49 -- 51 66 -- 68
The suction line temperatures in Table 7 are based upon
80°F dry bulb/67 degrees F wet bulb (50 percent R.H.)
temperature and rated airflow across the evaporator during
coolingcycle.
| TABLE 8
RECOMMENDED OPERATING RANGES
Model Rated Rated Recommended
СЕМ * ESP * Air Flow Range
WH301D 1100 .30 930 -- 1300
WH361D 1100 30 930 --1350
* Rated CFM and ESP on high speed tap.
~~ TABLES
INDOOR BLOWER PERFORMANCE
CFM € 230V
WH301D, WH361D
ESP. Low 230V : High 230V
In H,O | Dry Coll | WetCoif | Dry Coil | Wet Coil
0 | 950 935 1395 1315
1 930: 915 1340 1270
2 910: 885 1285 1190
3 855 830 1205 1100
4 800 755 1110 1000
5 ene ———- 1005 870
6 wan me — wore
Manual 2100-357
Page 18
( ин,
ит,
TABLE 10
MAXIMUM ESP OF OPERATION
ELECTRIC HEAT ONLY
Front Outlet
| $ Low High
Model Speed Speed
"А10 35 40
WH301D "ВОО ‚50 ‚50
WH361D -BO6 40 50
- — -BO9 35 1 45
WH30 1D ~C00 50 S50
WH351D -C06 50 S50
-CO9 30 40
Values shown are for unites equipped with STD 1 inch throw-
away filter on 1 inch washable filter. Derate ESP by .15 for
2 inch pleated filters, |
TABLE 11
COOLING PRESSURE — (Ali temperatures *F) -
Return Air
Model | Temperature | Pressure! 75 | 80 | 65 | 90 | 95 | 100 | 105 1.110 | 115
75 dey.DB ¡LowSide| 76] 78] 80] 81| 83| 84] .85] 871 es
62 deg. WB | HighSide| 235| 249] 263] 277| 291| 305| 319| 3331 347
80 дед. ОВ | LowSide| 81] 83| 85] 87] 88| so) 91] es] gal...
WH301D 1 67 deg. WB |HighSide| 241] 255] 269] 284] 208| 312| 327| 341| 356
“85 deg.DB | LowSide| 88) 90| 92} 93| 95] 97| 98! 100] 101
72 deg. WB | HighSide| 250| 264| 279| 294| 308| 323] sss| 353| aes| ——
75 deg. DB | LowsSide| 69| 71) 73| 75 76] 78} ‘80 e2l ea).
62 deg. WB | HighSide| 210| 226| 242| 257] 273] 290] 306| 323) asal
WHss1p | 80 deg.DB | LowSide| 73| 76] 78| 80| 82| 84| 85] 7) es
67 deg. WB { High Side] 216] 232] 248] 264| 281} 297| 314] 331] 348
-85deg.DB |LowSide| 79} 811 84| 86] 88f 90| 921 94! 95
72 deg. WB | High Side| 223] 240| 256] 273] 290 308| 325 3421 360
Low side pressure + 2 psig
High side pressure + 5 psig
Tables are based upon rated CFM (airflow) across the evaporator coil. if there is any doubt as to
correct operating charge being in the system, the charge should be removed, system evacuated and
- recharged to serial plate instruction. a _
Manual 2100-357
Page 19
TABLE 12
HEATING PRESSURES — (AI temperatures °F)
Model
Return Air
Temperature
Pressure
0
5
10
15
17
20
25
30
35
40
45
47
50
55
60
WH301D
70 deg.
Low Side
High Side
21
143
5
148
28
153
32
159
33
161
36
165
39
172
43
180
47
188
51
197
55
207
57
211
59
217
63
228
67
239
WH361D
70 deg.
Low Side
22
145
25
152
28
159
31
167
32
171
34
177
38
186
42
197
46
208
50
220
High Side
55
233
57
238
60
246
65
260
70
275
Low side pressure + 2 psig
High side pressure + 5 psig
Tables are based upon rated CFM (airflow) across the evaporator coil. if there is any doubt as to
correct operating charge being in the system, the charge should be removed, system evacuated and
recharged to serial piate instruction.
Model
TABLE 13
OPTIONAL ACCESSORIES
Description
WH301DB
WH301DC
WH361DA
WH361DB
WH361DC
EHWH30-A05
EMWH30-A10
Heater Packages
Heater Packages
> > | WH301DA
EHWH36-A05
EHWH36-A15
EHWH36-A10 |
Heater Packages
Heater Packages
Heater Packages
xxx
EHWH03-B06
EHWH03-B09
EHWHO3-B15 [Heater Packages
Heater Packages
Heater Packages
EHWH03-C06
EHWHO03-C09
EHWHO03-C15
Heater Packages
Heater Packages
Heater Packages
BOP-3
BFAD-3
MFAD-3
Blank Off Plate’ a.
Barometric Fresh Air Damper
Motorized Fresh Air Damper
CRV-3
EIFM-3
WERV-A3B
WERV-C3B
— |Classroom Ventilator with Exhaust —
Economizer with Exhaust
Energy Recovery Ventilator
Energy Recovery Ventilator
о x > >< -
> > > PX XK NK
Xx HFK XK XK
Xx Xx XxX IP XXX
CMH-3
CMH-7
CMH-9
CMH-15
start kit (SK)
Low Pressure Control (LPC)
Low Ambient Control (LAC)
LAC + LPC.
<< x
X ix XxX XIXXX
xxx
MEM MME XXX XXX
WMCB-058
WMCB-03B
WMPD-01
WMCB-06A
Circuit Breaker
Circuit Breaker
Circuit Breaker
Circuit Breaker
>< | >< > XX
xxx]
Manual
Page 20
2100-357
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