AERCO Esteem O&M Manual - Manual (Page 12)

66
N
OTICE
When maintaining zero clearance or
less than recommended clearances,
some product labeling may become
hidden and unreadable.
WARNING
W
HEN INSTALLING THE
E
STEEM
399 L
OW
NO
X
IN A CONFINED SPACE
,
SUFFICIENT AIR MUST
BE PROVIDED FOR PROPER COMBUSTION AND
VENTING AND TO ALLOW
,
UNDER NORMAL OPER
-
ATING CONDITIONS
,
PROPER AIR FLOW AROUND
THE PRODUCT TO MAINTAIN AMBIENT TEMPERA
-
TURES WITHIN SAFE LIMITS TO COMPLY WITH
THE
N
ATIONAL
F
UEL
G
AS
C
ODE
NFPA 54 -
LATEST EDITION
.
Residential Garage Installations
When installing the Esteem 399 Low NOx
in a residential garage, the following special
precautions per NFPA 54/ANSI Z223.1 must
be taken:
• Mount the unit a minimum 18 inches
[458 mm] above the floor level of the
garage. Ensure the burner and ignition
devices / controls are no less than 18
inches [458 mm] above the floor level.
• Locate or protect the unit in a manner
so it cannot be damaged by a moving
vehicle.
Boiler Freeze Protection Feature
The boiler control has a freeze protection fea-
ture built in. This feature monitors the boiler
temperature and responds as follows when no
call for heat is present:
• 46ºF Boiler circulator is ON
• 38ºF Boiler circulator is ON and burner
operates at low fire
• 50ºF Burner OFF and boiler circulator
operates for approximately 10 minutes
C
AUTION
The boiler freeze protection feature is
disabled during a hard lockout, how-
ever the space heating circulator will
operate.
C
AUTION
The boiler freeze protection feature
is designed to protect the boiler. The
boiler should be installed in a primary/
secondary piping arrangement if it is
installed in an unheated space or ex-
posed to water temperatures of 46ºF or
less. See “Chapter 5 Boiler Piping” on
page 16 for primary/secondary piping ex-
amples. See Chapter 10 for antifreeze
guides.
GF-125 GF-125