R 3753730 (1093)770 (363)1.25 (0.57)
R 4854880 (1430)770 (363)1.77 (0.80)
R 5956050 (1773)1280 (604)2.1 (0.95)
R 7757900 (2315)1300 (614)3.02 (1.37)
R 9058900 (2608)1380 (651)3.28 (1.49)
R 102510200 (2989)2025 (956)3.77 (1.71)
R 130512800 (3751)2000 (944)4.81(2.18)
R 205020400 (5979)4050 (1911)7.5 (3.40)
* R-404A at 30 °F S.S.T. with coil 30% full
R407C
R404A
Values Multiplied By:
*
Correction Factors for Other Refrigerants Use
R22
0.950.901.000.90
* When using R407C, the factor above is to be used when matching to condensing units with Dew Point ratings. This factor will ensure that proper
system balancing will occur to compensate for glide to t the application. If the system is sized correctly, one may expect a slight increase in system
capacity, along with slightly higher saturated suction temperatures.
R 9051115/1/60 1/12 10701.51.8815
R 10251115/1/60 1/12 10701.51.8815
R 13051115/1/60 1/12 10701.51.8815
R 20502115/1/60 1/12 10703.03.3815
POWER
SUPPLY
H.P. RPM
TOTAL
F.L.A.
TOTAL
F.L.A.
M.C.A. M.O.P.
M.C.A. M.O.P.
OPTIONAL P.S.C. MOTORS
MODEL QTY.
R 7751115/1/60 1/15 10601.321.6515
R 9051115/1/60 1/15 10601.321.6515
R 10251115/1/60 1/15 10601.321.6515
R 13051115/1/60 1/15 10601.321.6515
R 20502115/1/60 1/15 10602.642.9715
R 3751208-230/1/60 1/20 16000.290.3615
R 4851208-230/1/60 1/20 16000.290.3615
R 5951208-230/1/60 1/20 16000.290.3615
R 7751208-230/1/60 1/15 10600.540.6815
R 9051208-230/1/60 1/15 10600.540.6815
R 10251208-230/1/60 1/15 10600.540.6815
R 13051208-230/1/60 1/15 10600.540.6815
R 20502208-230/1/60 1/15 10601.081.2215
POWER
SUPPLY
H.P. RPM
M.C.A. = Minimum Circuit Ampacity
M.O.P. = Maximum Overcurrent Protection
TOTAL
F.L.A.
M.C.A. M.O.P.
Page 3
R60Hz
TYPICAL FIELD WIRING
K30-R-PDI-14
- 3 -
07/24/12
2nd FAN MOTOR
ON R2050 MODEL
DIMENSIONAL AND PHYSICAL DATA
MODELS R375 to R1305 (Single Fan)MODEL R2050 (Double Fan)
FLOW
3 3/4”
(96mm)
AIR
FLOW
(APPROX.
15 FEET
THROW)
4” (102mm)
MAX
AIR
EXTERNAL EQUALIZER CONNECTION
1/4” (5mm) O.D. (INSIDE CASING)
5/8” (16mm) O.D. DRAIN
WITH PLASTIC SLEEVE
24 7/8”
(632mm)
1” (25mm)
AIR
FLOW
SUCTION
EXTERNAL EQUALIZER
CONNECTION
1/4” (5MM) O.D. (INSIDE CASING)
AIR
FLOW
7/16” (11mm) DIA. HOLE
E
C
G
5/8” (16mm) O.D. DRAIN
WITH PLASTIC SLEEVE
B
F
MODELABCDEFG
R 375
R 485
R 595
R 775
R 905
R 1025
R 1305
R 2050
in
mm
in
mm
in
mm
in
mm
in
mm
8 1/8
(206.4)
11 1/8
(282.6)
11 1/8
(282.6)
12 5/8
(320.7)
33 1/4
(844.6)
39 1/4
(997.0)
42 1/4
(1073.1)
42 1/4
(1073.1)
12 5/8
(320.7)74(1879.6)
20 3/4
(527.0)2(50.8)
23 3/4
(603.3)
25 1/4
(641.4)
25 1/4
(641.4)
25 1/4
(641.4)
2 1/4
(57.2)
2 1/2
(63.5)
2 1/2
(63.5)
2 1/2
(63.5)
16 3/4
(425.5)
19 3/8
(492.1)
20 3/8
(417.5)
20 3/8
(417.5)
20 3/8
(417.5)
34 3/4
(882.7)
40 3/4
(1035.0)
43 3/4
(1111.3)
43 3/4
(1111.3)
75 1/2
(1917.5)
4 3/4
(120.7)
5 1/8
(130.2)
5 5/8
(142.9)
5 5/8
(142.9)
5 5/8
(142.9)
NOTE: 5/8” (15.9 mm) O.D. Drain connection on all models.
1/2” (12.7 mm) Sweat TX Valve connection on all models.
High Temp Evaporators are designed for use with R22,
R134a, R404A, R407A/C, or R507 refrigerants.
At room temperatures above 34
lower than 27
accomplish the defrost. Temperatures of 34
-40
°F) require positive defrosting. (either Electric or Hot Gas).
The coil must not be exposed to any abnormal atmospheric
or acidic environments. This may result in corrosion to the
cabinet and possible coil failure (leaks). (Consult
manufacturer for optional baked on phenolic protective coatings).
°F the air owing through the coil will
°F and evaporating temps no
°F and below (to
INSTALLATION
The installation and start-up of Evaporators should only be
performed by qualied refrigeration mechanics.
This equipment should be installed in accordance with all applicable codes, ordinances and local by-laws.
INSPECTION
Inspect all equipment before unpacking for visible signs of
damage or loss. Check shipping list against material received
to ensure shipment is complete.
IMPORTANT: Remember, you, the consignee, must make any
claim necessary against the transportation company.
Shipping damage or missing parts, when discovered at the
outset, will prevent later unnecessary and costly delays.
If damage or loss during transport is evident, make claim
to carrier, as this will be their responsibility, not the
manufacturer’s.
Should carton be damaged, but damage to equipment is not
obvious, a claim should be led for “concealed damage” with
the carrier.
IMPORTANT: The electrical characteristics of the unit should
be checked at this time to make sure they correspond to those
ordered and to electrical power available at the job site.
Save all shipping papers, tags and instruction sheets for reference by installer and owner.
LOCATION
The unit location in the room should be selected to ensure
uniform air distribution throughout the entire space to be refrigerated. Make sure that the air is not blown directly out through
the opened door and that the product does not obstruct the
free circulation of air.
NOTE: These units drawn air through the fan and discharge air from the coil side.
When installing the unit adjacent to a wall sufcient
clearance (2” (50mm) minimum) must be provided to allow the
hinged drain pan to be lowered for servicing the unit. Channel
type hangers are provided. Rear hangers are slotted to facilitate installation. See dimensional data.
MOUNTING
Mounting brackets with 7/16” dia holes are provided for ush
mounting to the ceiling. For details refer to dimensional data on
page 3.
Ensure that the ceiling is level since the drain pan has
been sloped for drainage during the defrost cycle.
DRAIN LINE
The drain line should be run from the drain connection, sloping
at least 4” per foot. A trap outside the room will prevent warm
air from entering through the tubing.
Connection should be made to proper drainage facilities that
comply with local regulations.
Ensure that the drain pan has sufcient slope for proper
drainage (prevention of ice build up/blockage in pan).
PIPING
Refrigerant line sizes are important and may not be the same
size as the coil connections. (depends on the length of run) If
in doubt, consult “Recommended refrigerant line sizes” charts.
(Engineering Manuals or other recognized sources of
information).
WIRING
Wire system in accordance with governing standards and local
codes. See data and wiring diagram on page 2, for wiring arrangement. Electrical wiring is to be sized in accordance with
minimum ampacity rating.
SYSTEM CHECK
Before Start-Up:
1. All wiring should be in accordance with local codes.
2. Refrigerant lines should be properly sized.
3. Off-cycle defrost systems should include a liquid line
solenoid valve.
4. Thorough evacuation and, dehydration has been
performed.
5. The suction, discharge, and receiver service valves must
be open.
6. The system should include a liquid line drier moisture
indicator and suction lter.
7. Pour enough water into the drain pan to allow a good check
on drainage and seal the trap.
After Start-Up:
1. Check the compressor oil level to ensure the correct oil
charge.
2. Be sure that the expansion valve is properly set to provide
the correct amount of superheat.
3. Heavy moisture loads are usually encountered when
starting the system for the rst time.
4. Check for proper evaporator fan blade rotation.
MAINTENANCE
The unit should be periodically inspected for any dirt or
build-up on the n surface and cleaned if necessary with a soft
whisk or brush.
Page 6
SERVICE PARTS LIST
K30-R-PDI-14
- 6 -
07/24/12
FAN MOTORS
MODEL
R 375170621 N/A1062534 109499828271 1043043
R 485170621 N/A1062534 109499828271 1043043
R 595170621 N/A1062534 109499828270 170512-003
R 775170620 10625411062542 109117628272 170512-003
R 905170620 10625411062542 109117628269 170512-003
R 1025170620 10625411062542 109117628269 170512-003
R 1305170620 10625411062542 109117628269 170512-003
R 2050170620 10625411062542 109117628269 170512-003
SHADED POLE
115V115V
PSCEC MOTOR
230V
115V
FAN BLADEFAN GUARD
SERVICE LOG
DATECOMMENTS
Page 7
Finished Goods Warranty
K30-R-PDI-14
- 7 -
07/24/12
The terms and conditions as described below in the General W arranty Policy cover all products
manufactured by National Refrigeration.
GeneraL Warranty PoLiCy
Subject to the terms and conditions hereof, the Company warrants all Products, including Service
Parts, manufactured by the Company to be free of defects in material or workmanship, under normal use and application for a period of one (1) year from the original date of installation, or eighteen
(18) months from the date of shipment from the Company, whichever occurs rst. Any replacement
part(s) so supplied will be warranted for the balance of the product’s original warranty. The part(s) to
be replaced must be made available in exchange for the replacement part(s) and reasonable proof
of the original installation date of the product must be presented in order to establish the effective
date of the warranty, failing which, the effective date will be based upon the date of manufacture plus
thirty (30) days. Any labour, material, refrigerant, transportation, freight or other charges incurred in
connection with the performance of this warranty will be the responsibility of the owner at the current rates and prices then in effect. This warranty may be transferred to a subsequent owner of the
product.
this Warranty does not CoVer
(a) Damages caused by accident, abuse, negligence, misuse, riot, re, ood, or Acts of God (b) damages
caused by operating the product in a corrosive atmosphere (c) damages caused by any unauthorized
alteration or repair of the system affecting the product’s reliability or performance (d) damages caused
by improper matching or application of the product or the product’s components (e) damages caused by
failing to provide routine and proper maintenance or service to the product (f) expenses incurred for the
erecting, disconnecting, or dismantling the product (g) parts used in connection with normal maintenance,
such as lters or belts (h) products no longer at the site of the original installation (i) products installed
or operated other than in accordance with the printed instructions, with the local installation or building
codes and with good trade practices (j) products lost or stolen.
No one is authorized to change this WARRANTY or to create for or on behalf of the Company any
other obligation or liability in connection with the Product(s). There is no other representation, warranty
or condition in any respect, expressed or implied, made by or binding upon the Company other than
the above or as provided by provincial or state law and which cannot be limited or excluded by such
law, nor will we be liable in any way for incidental, consequential, or special damages however caused.
The provisions of this additional written warranty are in addition to and not a modication of or subtraction
from the statutory warranties and other rights and remedies provided by Federal, Provincial or State laws.
PROJECT INFORMATION
System
Model NumberDate of Start-Up
Serial NumberService Contractor
RefrigerantPhone
Electrical SupplyFax
Page 8
“AS BUILT” SERVICE PARTS LIST
07/24/12
Service Parts List
Label
To Be Attached
HERE
NATIONAL REFRIGERATION &
AIR CONDITIONING CANADA CORP.