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035-17233-000-C-0702
Unitary Products 9
FIGURE 5 : TYPICAL FIELD WIRING
TABLE 4: GAS HEAT APPLICATION DATA
1
Input Capacity (Mbh) Output Capacity (Mbh)
Available on
Models
Gas Rate
2
(Ft.
3
/Hr.)
Temp Rise °F
At Full Input
3
0to2000Feet
Above Sea Level
4
2,000 to 4,500 Feet
Above Sea Level
0to2000Feet
Above Sea Level
4
2,000 to 4,500 Feet
Above Sea Level
Min. Max. Min. Max. Min. Max. Min. Max.
300 150 270 135 240 213 15 & 20 Ton 279 20 50
400 200 360 180 320 281 15 & 20 Ton 372 30 60
1
Heaters are shipped available fro natural gas, but can be converted to L.P./Propane with Kit Model No. 1NP0418.
2
Based on maximum input and 1075/Btu/Ft.
3
3
The air flow must be adjusted to obtain a temperature rise within the range shown.
4
MBH rating should be reduced at the rate of 4 percent for each 1,000 feet above 4,500 feet.
R
Y 1
Y 2
G
R
Y 1
Y 2
W 1
W 2
G
B
X
A 1
A 2
R H
R C
Y 1
Y 2
W 1
W 2
G
R
R H
Y 1
Y 2
W 1
W 2
G
B
L E D 1
L E D 2
C O M
A 1
A 2
T
T
4
4
3
3
Y 1
Y 2
W 1
W 2
G
B
X
A 1
A 2
L 1
L 3
L 2
R C
R
Y 1
Y 2
W 1
W 2
G
B
X
A 1
A 2
Y 3
N O T U S E D
T O R E M O T E S E N S O R
2 T H 0 4 7 0 2 2 2 4 I F U S E D
1
E l e c t r o n i c p r o g r a m m a b l e t h e r m o s t a t 2 E T 0 4 7 0 0 2 2 4 ( i n c l u d e s s u b b a s e ) .
2
T e r m i n a l b l o c k 1 T B - l o c a t e d o n r e l a y b o a r d i n 2 4 - v o l t s e c t i o n o f t h e u n i t c o n t r o l b o x .
3
S e c o n d s t a g e h e a t i n g i s n o t r e q u i r e d o n u n i t s w i t h a s i n g l e s t a g e e l e c t r i c h e a t e r .
4
T e r m i n a l s A 1 a n d A 2 p r o v i d e a r e l a y o u t p u t t o c l o s e t h e o u t d o o r e c o n o m i z e r d a m p e r s
w h e n t h e t h e r m o s t a t s w i t c h e s t o t h e s e t - b a c k p o s i t i o n .
N O T E : F a n s s w i t c h m u s t b e i n " O N "
p
o s i t i o n f o r m i n i m u m v e n t i l a t i o n d u r i n
g
h e a t e r o
p
e r a t i o n .
L I N E V O L T A G E
T E R M I N A L
B L O C K 2 T B
I N C O N T R O L B O X
G R O U N D L U G
R e f e r t o t h e
E L E C T R I C A L D A T A
t a b l e s t o s i z e t h e
p o w e r w i r i n g , t h e
f u s e s a n d t h e
d i s c o n n e c t s w i t c h .
2 4 V O L T
T R A N S F O R M E R
C O O L I N G O N L Y ( 2 4 V O L T T H E R M O S T A T )
U N I T T E R M I N A L
B L O C K 1 T B
2
C O O L I N G / H E A T I N G ( 2 4 V O L T T H E R M O S T A T )
T H E R M O S T A T
1
T E R M I N A L S
C O N T R O L W I R I N G
U N I T T E R M I N A L
B L O C K 1 T B
2
1
2 4 V o l t T h e r m o s t a t 2 T H 0 4 7 0 1 0 2 4 o r 2 T H 0 4 7 0 1 5 2 4
( w i t h S u b b a s e 2 T B 0 4 7 0 0 3 2 4 ) .
2
T e r m i n a l s t r i p 1 T B - l o c a t e d o n r e l a y b o a r d i n 2 4 - v o l t s e c t i o n
o f t h e u n i t c o n t r o l b o x .
3
S e c o n d s t a g e h e a t i n g i s n o t r e q u i r e d o n u n i t s w i t h a s i n g l e s t a g e
e l e c t r i c h e a t e r .
T H E R M O S T A T
1
T E R M I N A L S
U N I T T E R M I N A L
B L O C K 1 T B
2
C O O L I N G O N L Y ( 2 4 V O L T T H E R M O S T A T )
1
2 4 V o l t T h e r m o s t a t 2 T H 0 4 7 0 1 2 2 4 o r 2 T H 0 4 7 0 1 5 2 4
( w i t h S u b b a s e 2 T B 0 4 7 0 0 2 2 4 ) .
T e r m i n a l b l o c k 1 T B - l o c a t e d o n r e l a y b o a r d i n 2 4 - v o l t s e c t i o n
o f t h e u n i t c o n t r o l b o x .
2 4 V O L T
T R A N S F O R M E R
T H E R M O S T A T
1
T E R M I N A L S
2 4 V O L T
T R A N S F O R M E R
P O W E R W I R I N G
A D D
J U M P E R
A D D
J U M P E R
A D D
J U M P E R