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Heat Anticipator Setting; Temperature Setting - Honeywell t841a Installation Instructions Manual

Heating-cooling

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THERMOSTAT
___ A _____
Fig. 16. Internal schematic and typical w iring diagram fo r T841A1720. Provides heat changeover relay control.
SETTINGS

Heat Anticipator Setting

O n m o d e l s h o w n in F ig . 2, 3, 6 , 7, 8, 11, 1 4, 16 a n d 1 7 th e
s e c o n d s ta g e h e a t a n tic ip a to r is a d ju s ta b le . O n th e s e
m o d e ls , m o v e th e a d ju s ta b le in d ic a to r to m a tc h th e c u rre n t
d r a w o f th e s e c o n d s ta g e h e a tin g p rim a ry c o n tro l, o r th e
a n tic ip a to r s e ttin g o f th e o ld th e rm o s ta t. S e e F ig . 18.

Temperature Setting

M o v e th e s e tp o in t le v e r to th e d e s ir e d c o n tro l p o in t o n th e
te m p e ra tu r e s c a le .
System Switch Setting
T h e s y s te m s w itc h in g p o s itio n s c o n tro l th e s y s te m
o p e ra tio n a s fo llo w s .
E M . H T. (T 8 4 1 A o n ly )— e m e r g e n c y h e a t re la y is
e n e rg iz e d . C o o lin g s y s te m is o ff. C o m p re s s o r is d e ­
e n e rg iz e d . F a n ru n s w ith c a ll fo r h e a t in A U T O p o s itio n .
E M . H T . L E D is o n.
H E A T — h e a tin g s y s te m is a u to m a tic a lly c o n tro lle d b y th e
th e rm o s ta t. C o o lin g s y s te m is o ff.
O F F — b o th th e h e a tin g a n d c o o lin g s y s te m s a re o ff. If th e
fa n is a t A U T O p o s itio n , th e c o o lin g fa n is a ls o o ff.
C O O L — c o o lin g s y s te m is a u to m a tic a lly c o n tro lle d b y th e
th e rm o s ta t. H e a tin g s y s te m is off.
T841A HEATING-COOLING THERMOSTATS
SUBBASE
__ A ___
SYSTEM
Fig. 18. Second stage adjustable heat anticipator
Fan Switch Setting
A U T O — fa n o p e ra te s a u to m a tic a lly a s h e a tin g o r c o o lin g
e q u ip m e n t c y c le s o n .
O N — fa n o p e ra te s c o n tin u o u s ly .
11
SYSTEM COM PONENTS
______A ________
A
/ -
indicator.
69-1218

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