background image

GRD.

LUG

CONTACTOR

GRD.

SCREW

M

T1

L1

L2

OUTDOOR UNIT

THERMOSTAT

INDOOR UNIT

T2

POWER WIRING

208/230-1-60 

230-1-50

POWER WIRING

24V CONTROL WIRING

(NEC CLASS 2)

CIRCUIT

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 circuit breaker.

3,4

1

3
4

Terminal not used on all thermostats.

2

Y

W1 or 66

W

DEFROST

CONTROL

R

C

R

60 or W2

G

O

B or C

W1

Y

R

O

G

W

Y

7 WIRES

RED

B or C

L or X

T

E

FIELD

INSTALLED

JUMPER

1

2

2

BLK

YEL

ORG

WHT

BRN

PRP

X

O

FIGURE 8 - TYPICAL LOW VOLTAGE FIELD WIRING

 SINGLE PHASE —  10, 12, & 14 SEER HEAT PUMPS MODELS
                      AIR HANDLERS / ELECTRIC HEAT

Y

O

W 1   o r   6 6

W

G R D .

L U G

D E F R O S T

C O N T R O L

C O N T A C T O R

G R D .

S C R E W

M

R

R

6 0   o r   W 2

G

O

B   o r   C

W 1

Y

R

O

G

W

Y

7   W I R E S

O U T D O O R   U N I T

T H E R M O S T A T

I N D O O R   U N I T

P O W E R   W I R I N G

2 0 8 / 2 3 0 - 3 - 6 0

4 6 0 - 3 - 6 0  

P O W E R   W I R I N G

2 4 V   C O N T R O L   W I R I N G  

( N E C     C L A S S   2 )

L O W   V O L T A G E   T E R M I N A L   B L O C K

  3 , 4

I N   A I R   H A N D L E R   W I T H   E L E C T R I C   H E A T

3

C h e c k   t h e   l o w   v o l t a g e   t e r m i n a l   b l o c k   o n   t h e   i n d o o r   u n i t   f o r

t h e   a c t u a l   a r r a n g e m e n t   o f   t h e   t e r m i n a l s .

A L L   W I R I N G   T O   B E   I N   A C C O R D A N C E   W I T H   N A T I O N A L   E L E C T R I C   C O D E   A N D / O R   L O C A L   C O D E S

R E D

P O W E R

S U P P L Y

2 0 8 / 2 3 0 - 3 - 6 0

4 6 0 - 3 - 6 0

B   o r   C

L   o r   X

J u m p e r   t e r m i n a l s   E   a n d   W   t o  

h e a t   o n   f i r s t   s t a g e   d u r i n g

E m e r g e n c y   H e a t .

T e r m i n a l   n o t   u s e d   o n

a l l   t h e r m o s t a t s .

T

E

F I E L D

I N S T A L L E D

J U M P E R

1

1

2

2

2

B L K

Y E L

O R G

W H T

B R N

P R P

T 1

L 1

L 2

T 2

T 3

L 3

C

  X

4

C o n n e c t   p o w e r   w i r i n g   t o   t e r m i n a l   b l o c k   3 T B   o n   u n i t s

w i t h o u t   e l e c t r i c   h e a t   o r   c i r c u i t   b r e a k e r .

FIGURE 9 - TYPICAL LOW VOLTAGE FIELD WIRING

— THREE PHASE — 10 SEER HEAT PUMPS MODELS
          AIR 

HANDLER/ELECTRIC 

HEAT

515.16-N3Y

8

Unitary Products Group

Summary of Contents for E*RC Series

Page 1: ...or in the Directory of Certified Unitary Heat Pumps published by the Air Conditioning and Refrigeration Institute Using unmatched com ponents may not only affect the performance of the system but may...

Page 2: ...ue to wind chill effect Provide ample clearance from shrubs to allow adequate air to pass across the outdoor coil without leaves or branches being pulled into the coil The outdoor unit may never go in...

Page 3: ...bing must be done with care to obtain reliable trouble free operation 1 Selection of proper refrigerant tubing grade and size 2 Refrigerant line routing cutting and fitting 3 Insulating the vapor line...

Page 4: ...Recommendations and Refrigerant Line Length for vapor and liquid line sizing cali bration of liquid line pressure loss or gain determination of vapor line velocity elevation limitations orifice connec...

Page 5: ...for volts frequency phase maxi mum fuse size and minimum branch circuit ampacity Refer to the wiring diagram inside the unit control box cover before connecting to power supply 1 The line voltage ser...

Page 6: ...TAGE BOX FAN MOTOR PLUG FIGURE 4 OUTDOOR UNIT CONTROL BOX SINGLE PHASE 10 12 SEER CONTACTOR DUAL RUN FAN CAPACITOR GROUND LUG ADJUSTABLE HIGH VOLTAGE CONDUIT PLATE DEFROST CONTROL BOARD FINGERED BUSHI...

Page 7: ...FIGURE 6 OUTDOOR UNIT CONTROL BOX THREE PHASE 10 SEER 036 and 048 Models FIGURE 7 OUTDOOR UNIT CONTROL BOX THREE PHASE 10 SEER 060 Model 515 16 N3Y Unitary Products Group 7...

Page 8: ...D O O R U N I T T H E R M O S T A T I N D O O R U N I T P O W E R W I R I N G 2 0 8 2 3 0 3 6 0 4 6 0 3 6 0 P O W E R W I R I N G 2 4 V C O N T R O L W I R I N G N E C C L A S S 2 L O W V O L T A G E...

Page 9: ...FROST SAFETY LOCKOUT MODE The lock out control opens the circuits to the compressor contactor stopping the compressor in response to 400 High Pressure limit switch opening for more than one second The...

Page 10: ...l remain in defrost until the defrost thermostat opens or 10 minutes expires If the thermostat is open when the short is removed the heat pump will exit defrost immediately 14 SEER WITH DEMAND DEFROST...

Page 11: ...DRYER solid core SHOWN IN COOLING POSITION ORIFICE heating FIGURE 13 FLOW DIAGRAM 060 10 12 SEER Single Phase INDOOR COIL COMPRESSOR 4 WAY REVERSING VALVE SUCTION ACCUMULATOR OUTDOOR COIL COOLING CYCL...

Page 12: ...low 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 F or 14 minutes expires If t...

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