WARREN-SHERER MIA User manual

FORM NUMBER: M-1
DATE: .9/25/79
REVISED:
WARRENKHERER
INSTALLATION&
OPERATION
MANUAL
MODEL:
MIA (G)
MEAT MERCHANDISERS
(AIR DEFROST)
THIS REFRIGERATOR CONFORMS TO THE COMMERCIAL
REFRIGERATOR MANUFACTURERS ASSOCIATION HEALTH AND
SANITATION STAN+DARD. ’
CRS-SI-78
WARREN HERER
DIVISION OF KYSOR INDUSTRIAL CORPORATION
1600 ROCKDALEINDUSTRIALBLVD.,CONYERS,GEORGlA30207/404~483+j600

INSTALLATION
MODEL M
Page 1
AND OPERATING INSTRUCTIONS
FOR
A MEAT MERCHANDISER
(FRESH MEAT)
APPLICATION: This meat merchandiser was designed to display fresh
packaged meats under proper storage temperature. They
are designed for use in an air conditioned store where
temperatures'and humidity are maintained @ 75' dry bulb
and not higher than 64O wet bulb (55% relative humidity).
Your meat merchandiser should be installed and operated
according to the instructions contained in this manual to
insure proper performance.
GENERAL: These meat merchandisers are a self service merchandiser.
They can be installed in a continuous line-up consisting of
several 8-foot and.l2-foot sections by using a joint trim kit.
When the line-up is operated on two (2) or more units it is
necessary to use a plexiglass divider between the separate
refrigeration systems.
The merchandiser can also be installed individually. En&
are removable so additional sections may be added.
MODEL:
--
MlA
DESCRIPTION
Meat merchandiser sing
"AIR DEFROST"
MlAG G Meat merchandiser sing
with glass front. "AIR
SERIAL NUMBER DESIGNATION
e duty. 737 A
e duty
DEFROST" 738 A
SHIPPING DAMAGE: All equipment should be examined for shipping damage before
and during unloading. If there is any damage, the carrier
should be notified immediately and an inspection requested.
The delivery receipt "must" be noted that the equipment was
'~ received 'damaged. If damage is of a concealed nature you
must contact the carrier immediately or no later than three
(3) days following delivery. A claim must be filed with the
carrier by the consignee for all damage.
NOTE: Your equipment, when delivered, will have a
sticker attached advising what must be done to
report any damage.
LEVELING: Your new refrigerator must be perfectly level to insure proper
operation of the refrigeration system and also to insure pro-
per drainage after defrost.
Proper leveling when multiplexing can be accomplished by finding
the highest point on the floor at the location of the line-up

(continued) .
LEVELING: by using a level and a
chalk line. Place a refrigerator at this
. point and use shims as needed to line the other refrigerators to
this high point. Se sure sufficient shims are employed so as to
prevenet settling of the refrigerators.
STORE DRAFTS:
JOINING:
WASTE OUTLET
CONNECTIONS:
INSTALLING
DRIP PIPE:
CLEANING:
Page 2
Room air currents or drafts will seriously affect the operation
of any open-type fixture. Be sure fans, space heaters, or air
conditioning grilles do not produce currents sufficent to more
air across the fixtures. Air movements across an open fixture
will cause the case temperature to be high and create defrosting
di'fficulties. This will result in an increase of operating costs.
Two or more fixtures of like models can be joined together to form
a continuous line-up. Instruction for joining fixtures are in-
cluded in the joint kit&d& n~-~zbds
These cases are equipped with a l-1/2" (nominal 2") FPT waste
outlet connection which terminates in the center of the refrig-
erator below insulated bottom. An open drip space
between case and sewer connection is recomended.
(nominal 2") in line water seal and street ell is furnished with
each fixture for field installation. This assembly must be in-
stalled directly to the fixture waste outlet. CAUTION: Do not
install a second water seal or drain trap as this will cause a
double trap and drainage problems.
Improperly installed drip pipes can seriously effect the operation
of this equipment and result in maintenance cost and proper in-
stallation.
1 . Never use a pipe smaller than the size pipe or water seal
supplied with the equipment.
2 . Always provide as much fall as possible in drip pipe (l-1/8"
per foot in the minimum.)
-~
3 . Avoid long runs in drip pipe which make it impossible to
provide minimum fall in pipe.
4 . Provide a drip space between drip pipe and floor drain or
sewer connection.
5 . Do not allow drip pipe to come in contact with uninsulated
suction lines, which will cause the condensation from your
refrigerator to freeze.
The bottom display we1 1 is sectional so pans can be removed for
easy cleaning. The fan plenum is hinged for access to waste
outlet.

_. Page 3
CLEANING:(cont'd.) To insure minimum maintenance cost, cabinet should be
thoroughly emptied and washed inside at least every
three months (3). The exterior should be washed down
weekly. A mild soap and water solution is recommended
for painted surfaces of the cabinet. Do not use cleaners
containing abrasive materials which will scratch or dull
finish. The waste outlet should be flushed with a bucket
of water following each cleaning.
Caution: Never introduce water into the fixture faster
than waste outlet can carry it away.
Be sure refrigeration is shut-off and all electrical is off
before washing your refrigerator.
L.OADI NG : Merchandise should not be placed in the fixture until all
controls have been adjusted and the refrigerator is at
proper temperature.
At no time should the fixture be stacked beyond the load
line located on the top of the back baffle and each end
of the refrigerator.
For proper operation, you must not stack merchandise above
the load lines. In doing so, you will seriously affect the
performance, which will result in higher temperatures.
LOAD LINES: . For proper operation, you must not stack merchandise above
the air return grilles. In doing so, you will seriously
affect the performance of the refrigerator, which will re-
sult in higher temperature of the merchandise stored within.
Therefore,-IT IS ESSENTIAL THAT MERCHANDISE IS NOT STORED
ABOVE THIS POINT.
IMPORTANT : Before loading the refrigerator, be sure to check all access
plates and be sure they are thoroughly sealed, and the
rubber on the bottom of the plenum chamber is sealed firmly
to the bottom.
ELECTRICAL: All field installed wiring must comply with the National
'~ Electrical Code and Local Codes.
ELECTRICAL
CONNECTIONS : Be sure proper voltage is supplied to your refrigerator.
Check refrigerator serial plate for fan and anti-condensate
volts. ALL REFRIGERATORS MUST BE GROUNDED.
When multiplexing refrigerators to one 115V electrical source,
the total case fan and anti-condensate amperes must be added .i
together, and proper wire size and branch circuit fuse or
circuit breaker as required by the National Electric Code must
be employed. THIS CIRCUIT MUST BE RUN CONTINUOUSLY AND MUST BE
MARKED suffi ciently to prevent the fan motors and anti-conden-
sate from be ing turned off accidentally.

(continued) Page 4
ELECTRICAL
RACEWAY: An electrical raceway is furnished with each refrigerator
for running the fan, anti-condensate, lighting, and control
circuits fro? c
applies, of Iv*
cizad& ecto case without using conduit. This when the front panel is properly
secured into position. This is approved by the Underwriters
Laboratories and may or may not comply with local codes.
MODEL EVAPORATOR FAN
AMPS. @ 115 VOLTS ANTI-CONDENSATE
AMPS. @ 115 VOLTS DEFROST AMPS.
MlA-8 .6 None
MlA-12 .9 . 70 None
MlAG-8 .6 JF t 70 None
MlAG-12 .9 11 . None
FAN MOTORS: The fan motors employed are permanently oiled for the life
of the motor and require no periodic maintenance. These
are to be wired according to the enclosed wiring diagram.
Case fans run continuously; they do reverse during the
defrost cycle when using "AIR DEFROST". The case fan blade
will turn counterclockwise when looking into the refrig-
erator. The case fan blade must have it's rib facing up
for proper operation. A label on the blade will also ad-
vise you if they are properly installed.
ANTI-CONDENSATE
HEATERS: These heaters are placed in the fixture to eliminate sweat
from forming on certain areas of the fixture. The cross-
section of fixture shows location of the heaters.
REFRIGERATION
EXPANSION VALVE: The expansion valve furnished with your refrigeratior has
been carefully sized and set for maximum coil efficiency.
This bulb is located on the outlet of the coil. This location
MUST NOT BE CHANGED. Due to local conditions, adjustment
of the thermostatic expansion valve may be necessary after
+‘a minimum of 6 hours operation. Do not adjust the expansion
valve at this point until you have checked the inlet strainer.
If adjustment is necessary, adjust valve to give frost line
to ferrule hole where suctio'n line exits the refrigerator.
Adjust expansion valve l/4 turn and wait for 30 minutes
before making final check.
REFRIGERATION
LINES: On Warren/Sherer meat merchandisers, the liquid and suction
lines are located to the right of case center in the bottom
area. The suction line is 5/8"OD for Ml, and the liquid
line is 3/8"OD. The tubing faces forward so that an elbow
may be used, or if multiplexing a tee can be used. Be sure
all refrigerant lines lie as close to the refriserator bottom
as possible so as not Q-obstruct-the return-air section of
the refrigerator.

(continued) Page 5
REFRIGERANT: Refrigerant R-502 is optional. Refrigerant R-12 is
standard. The customer's order must specify the re-
frigerant to be employed so the proper expansion valve
can be supplied with refrigerator.
HEAT EXCHANGER: The heat exchanger incorporated in the refrigerator was
sized to give maximum efficiency to the refrigeration
system.
The heat exchanger uses the heat of the incoming liquid
refrigerant to raise the temperature of the return suction
gas temperature.
The heat exchanger increases the over-all capacity of the
refrigeration system and aids in the evaporation of any liquid
refrigerant entrained in the suction gases, thereby preventing
"flood-back" to the compressor.
OPERATION: The Ml meat merchandisers, either a thermostat or low-pressure
control can be used to obtain proper temperature. When a
condensing unit is subjected to low ambients during the winter
months, a thermostat must be used. The thermostat bulb should
be mounted above the evaporator coil.
The chart below shows approximate setting for the Ml meat
merchandisers. Since many variables are present in each
installation, such as store temperature, length of tubing
runs, temperature desired in refrigerator, etc., the below
is only a guide for the installer. Final adjustments should
be made to meet the local conditions and requirements.
APPROXIMATE CONTROL SETTINGS:
REFRIGERANT LOW PRESSURE
CUT-OUT CUT-IN
THERMOSTAT HIGH-PRESSURE
CUT-OUT CUT-IN CUT-OUT-MAXIMUM
Fresh Meat R-12 13 Psi 27 Psi 260 340 200 Psi
R-502 39 Psi 63 Psi 26 0
34 0 340 Psi
When using thermostats, lower the low pressure control cut-out
below the setting above, so as to make sure the thermostat
is the controlling devise.
DEHYDRATION OF
REFRIGERATION
SYSTEM: PLEASE READ CAREFULLY BEFORE PLACING SYSTEM INTO OPERATION
1 . After laying refrigerant lines, they should be blown out
before making final connection at fixture or condensing
unit. Use either carbon dioxide or dry nitrogen to pre-
vent any foreign matter being left in the lines. Keep
pressure below 250 pounds.

l , ‘
-.
(continued) Page 6
DEHYDRATION OF
REFRIGERATION
SYSTEM: 2 . To prevent scaiing due to brazing, dry nitrogen should be
allowed to flow through lines while brazing operations are
taking place.
3 . After installation is complete and checked for leaks, pump
a deep vacuum using a vacuum pump. DO NOT USE THE CONDENSING
UNIT FOR THIS PURPOSE.
4 . Break vacuum on system by releasing refrigerant through a
dehydrator until pressure gauge reads above zero pounds.
Repeat steps three and four.
5 . A dehydrator should be used in the charging line when adding
refrigerant.
6 . A dehydrator of sufficient capacity must be installed in the
liquid line before placing system into operation.
DEFROSTING: This Warren/Sherer meat merchandiser (Ml) has "AIR DEFROST'*
as standard. The evaporator fans run continuously during
the refrigeration cycle. These same fans reverse during the
defrost cycle, which is initiated by the time clock. The
time clock (normally open circuit) energizes the relay at the
case, which reverses the fans and pulls store air into the
honeycomb at the refrigeration outlet and thru the air ducts,
evaporator coil, and discharges the air out the return grills.
One (1) thermo-disc located on the evaporator coil terminates
the defrost cycle. The thermo-disc is non-adjustable and
are set O 45oF. The thermo-disc is located at the bottom right-
hand of the evaporator coil. It is necessary to remove the
valve access plate on fan housing td see or service this control.
The time clock should be set @ a failsafe setting of 45
minutes and for three (3) defrost per day (every 8 hours).
When high humidity exists, it may be necessary to increase
to four per day (every 6 hours).
DEFROST CONTROLS: ' ihe defrost is initiated by atime clock at the condensing
unit control panel which energizes the relay at the case to
b 4. 'a reverse the fans.
; ?...ks'I A 208/230 volt control circuit from time
, ,.,I\ r;:;
(, <J .& b,**::L., .,k, p- -' clock to the relay @ the case is required. Defrost is ter- \ J'9gf.J' 2 ..).d
s . i -g.* /-$.<>a.
.Qi'~ ,-*,.y'$
-> minated by the therm-o-disc (45O) attached to the evaporator
<.'
f-J-+ ,~~,.~,~~~..c-c- coil. Control wiring from the therm-o-disc to time clock should
.,':‘r 6% *I*
** d be wired as shown on the wiring diagram.
* %
HiT.;GAS DEFROST
(ACCESSORY): Reverse cycle defrost kits are offered as an accessory
and are installed at the factory. Reverse cycle hot gas
defrost is not recommended above air defrost but may be
specified when using Dual-Metic type condensing units.
Control settings are the same as for air defrost.

Page 7
PART DESCRIPTION
REF a MlA(G)
NO.
8 I 12 I
I I I
Honeycomb (Plastic) 13A15-12
13A15-12
Discharge Air Grille 54P16-207 54P16-208
Expansion Valve 3AlO-22 3All-23
Evaporation Coil 5A20-32 5A20-33
Heat Exchanger Ass'y. 88ClO-131 88ClO-131
Thermostat Therm-o-disc 8All-26 8A;l-26
Motor W/Fasteners
Fan Blade 9BlO-13 9810-13
Wiring Harness (Fan) lOMlO-128 lOMlO-128
Thermopane Anti-Sweat Heater * 81Al2-34 81Al4-34
Thermopane Glass * 14DlO-29 1 14DlO-30
Capacitor/Relay Box Ass'y. 82E13-65 82E13-62
Relay 8Ell-38 8E7 l-38 I
Relay Base 8Ell-37 8Ell-37
Terminal Block lOH12-13 lOH12-13
Terminal Block End lOH12-14 lOH12-14 I
Capacitor lOK14-55 lOK14-55
Drain Trap (External)
Expansion Valve (R-502)
I
60Nll:48 60Nll-48
4. ' I
7
3AlO-26 3Al l-25 I
* Glass Front Model Only S/N/D 737A-738A

PART DESCRIPTION
3-l/2" Price Tag Moulding
1 Thermopane Cap
I Thermopane Base
1 Bumper Trim
IUpper Front Panel
r - ~
Lower Front Panel
1 Kickplate (Painted)
(Stainless Steel)
[ Colorband (Painted)
(Vinyl)
r
(Gold Anodized)
Front Baffle -* I
I----
Front Baffle
I
Rear Baffle
I--
Deck Pan
REF 0
NO l
Page 8
MlA(G)
8 I 12 I
I
62J17-30 62517-31
15Jll-43 15311-44
15Jll-47 15Jll-48
15Jlb49 15Jll-50
51A12-85 51Al4-75
51A12-86 51A14-74
51Al2-88 51A14-77
55A32-74 55A32-75
51Al7-33 51A19-33
53ElO-41 53ElO-42
.
62520-31 62J20-33
54628-74 54G28-74
54628-73 54628-73
54~28-141 54H30-73
56J13-11 56J13-11
28619-130 28619-130
* Glass Front Model Only S/N/D 737A-738A

I I
L
L
- -i-Al ” I

12 FT. CASE-I210” (365.8 CM)
8 F-l- CASE &OH (24=&8 CM)’
I
w5,
(2 6.7 CMii
3i/ I 88
2
(82.5 CM)
#d
~8 (I
13.7
CM)
(20.3 CM) I
I \
FRONr \
- REFRIGERATION COP ECTION
Y I \ I
LDRAIN CONNECTION (W/TRAP)
LAREA FOR ‘STUB-UPS” ”
ELECTRICAL CONNECT-ION
FAN RELAY BOX
(SERVICE 0Nw) a a 1 I
ILtrTER
REVISED
I . DATE BY
DATE 6.8.79 nTLE
I 1
scALE&z1104
p L A N
VIEW
I A
DRAWN
MODEL MIA(G)
APPD.

TOP CAP ANTI-SWEAT HEATER .
8’ .35 AMPS 12’ .?AMPS
I- Ls
vu
FAN MOTORS
,3 AMPS. EA. 7 r I-’
1
t-
- -1
JUNCTION BOX INSIDE
-cl (I- - I i- ,-
4’ J”
‘i-; - - ‘.’
’ 1 ’ I
-J I
- -’
1 bKttN bKUUNU {I* I ’ r-------1
BLACK Q RED I I CLOSE ON RISE
I I
2 3
1 L------r,,
I 4 “’ \I I 1 I
I I
TO DEFROST , I-)MER
N Ahhr?“3 N
CAPACt TOR/RELAY BOX
I-- -+-&!/; \
I ’LETTER
REVISED
OATE TITLE
I
TEMPERATURE 1 ,
I CONTROL
4---78 4WIRING DIAGRAM FOR
I
SCALE
NONE
I THERMOSTAT . .
(ACCESSORY) I
DRAWN
MIA(G)-8’81 12’
L------J ’CHURCH ILL
Ap&?- c I D..<oB.@..)0”a4&,‘..., t,~~n~,r.~.*

THE
NOT
HOT
TOP CAP ANTI-SWEAT HEATER
8’ .35 AMPS 12’ .7AMPS
( THERMOPANE ANTI-SWEAT HEATER
MIAGONLY
8’.4AMPS 12’ .48AMPS
I
RACEWAY I 2
GREEN GROUND I*
SE WIRES
USED ON
GAS DEFROST
CAPACITOR/RELAY BOX
9 IO i-7 I9 - TO TERMINALS NEI X ON I
II 1 DEFROST TIMii*8145-20, 1
1 I . FIELD WIRED IN SERIES
W/OTHER CASES ON SAME 1 CI .
4
I J SYSTEM. DEFROS
r-------q I TERMINAT T
‘ION
I
CLOSE ON RISE I I
I I THERMOSTAT
.
~ ; I__- I
,-0-m I
I
I.--- -J--.-&j t
I TEMPERATURE 1 I CONTROL I
I THERMOSTAT
(ACCESSORY) I
---
J
NOTE.’ THERMOSTAT SFfdSOR
8tJI.p MUST BE LOCATED
IN DI’;CHARGE AIR.

Page 13
DESCRIPTION MoTioR
ASSY - _ -
SUBJECT _ ROUTE
DATE 3-23*78 BY CK’D, BY
SHEAR 2 3132 BRAKE. PUNCH * ‘frs FINISH
?ART OF ASSY*
REVISED
PPS
PTII, GAL.
PR*
.
.
.
.
;
.
.
i
i
I
.
I
:
.
\
f
.
.

Page 14
MP#
&Z&/3-62
DESCRIPTION wl R/N
SUBJECT U/fc 01
0 ) M/Gl-M4CGJ 12 / ROUTE
I MATL. .
DATE 3 z20-78 By rd CK@D. BY ’ BLANK
ASSY
f l/32 BRAKE, PUNCH +, ljl5 FINISH REQ’D. &&E
SHEAR PPY
PTU
PR#
GAL.
GAL.
*I
ll
i ;
I
I I
. I