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Johnson Controls MR4PMUHV User Manual

Johnson Controls MR4PMUHV
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12 MR4PMUHV Electronic Temperature/Defrost Control with Relay Pack Product/Technical Bulletin
Relay Electrical Ratings
Relay Ratings in Tables 7-9 are for ambient
temperatures in the range -40 to 111°F (-40 to 44°C).
Derate electrical ratings 3.45% per 1F° in the range
111 to 140°F. Derate electrical ratings 6.25% per 1C°
in the range 44 to 60°C.
Table 7: Fan Relay Single-Pole, Double-Throw (SPDT) Electrical Ratings
Single-Phase Ratings
24 VAC
120 VAC
208 VAC
240 VAC
Horsepower Rating
1/3
1/2
3/4
AC Full Load Ampere
7.2
5.65
6.9
AC Locked Rotor Ampere
43.2
33.9
41.4
Pilot Duty (VA)
50
325
450
600
Table 8: Defrost Heater and Compressor Relay Single-Pole, Single-Throw (SPST) Electrical Ratings
Single-Phase Ratings
24 VAC
120 VAC
208 VAC
240 VAC
Horsepower Rating
1
1.5
2
AC Full Load Ampere
16
11
12
AC Locked Rotor Ampere
96
66
72
Noninductive Load Ampere (Defrost Heater Only)
20
20
20
Pilot Duty (VA)
125
750
825
1125
Table 9: Alarm Relay (SPST) Electrical Ratings
Single-Phase Ratings
24 VAC
120 VAC
208 VAC
240 VAC
Noninductive Load Ampere
5
5
5
5
Pilot Duty (VA)
125
250
325

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Johnson Controls MR4PMUHV Specifications

MR4PMUHV-12C

Power IconPower
frequency60 Hz
power consumption5VA @240, 5VA @120
Operating Environment IconOperating Environment
ambient operating conditions+14 to +111°F (-10 to +44°C); derate 6.25% per 1°C from 45°C to 60°C; 0 to 95 % RH (non-condensing)
ambient storage conditions-22 to +176°F (-30 to +80°C); 0 to 95 % RH (non-condensing)
accuracy± 1.8F° ( ± 1C°)
Weight and Dimensions IconWeight and Dimensions
dimensions7.94 x 3.6 x 2.4 in. (202 x 92 x 61 mm)
shipping weight2.9 lb (1320g)
A99 sensor cable length6.6 ft (2m)

MR4PM12C-12C

Operating Environment IconOperating Environment
ambient operating conditions+14 to +140°F (-10 to +60°C); 0 to 95 % RH (non-condensing)
ambient storage conditions-22 to +176°F (-30 to +80°C); 0 to 95 % RH (non-condensing)
accuracy± 1.8F° ( ± 1C°)

RP4MRUHV-1C

Operating Environment IconOperating Environment
ambient operating conditions-40 to +111°F (-40 to +44°C); derate 6.25% per 1°C from 45°C to 60°C; 0 to 95 % RH (non-condensing)
ambient storage conditions-40 to +185°F (-40 to +85°C); 0 to 95 % RH (non-condensing)
accuracy± 1.8F° ( ± 1C°)