Install Instructions

Part number 550-100-090/1113
107
GAS-FIRED WATER BOILER — Boiler Manual
-!).4%.!.#%30%#)&)#!4)/.3
Display
Condition Diagnostics Corrective Action(s)
("47"-7&
FAULT
5IF6$POUSPMIBTEFUFDUFE
a problem with it gas valve
output circuit
Automatic retry when condition
exists. Boiler will reset if
conditions clears. If condition
does not clear boiler will retry in
1 hour. If condition is not clear
after 1 hour, boiler will require
manual reset.
$IFDLXJSFIBSOFTTDPOOFDUJPOTCFUXFFOHBTWBMWFBOE6$POUSPM
Check resistance between
*GMPDLPVUSFPDDVSTSFQMBDF6$POUSPM
"*313&4463&
48'"6-5
Air Pressure switch is open Ultra residential boilers do not
use an air pressure switch, but
instead have a wire jumper
JOTUBMMFECFUXFFO1QJOT
Reset using manual reset screen
on display
$IFDLCPJMFSTJ[FTFMFDUFEJO6$POUSPMBHBJOTUCPJMFSSBUJOHMBCFM$PSSFDU
if necessary to select the proper boiler size.
$IFDLUIF1DPOOFDUJPOBTTFFOPO'JHVSFT to determine proper
jumper wire location.
("413&4463&
48'"6-5
Gas pressure switch is open
(high or low)
Residential Ultra Boilers do
not use gas pressure switches.
Requires manual reset.
$IFDLCPJMFSTJ[FTFMFDUFEJO6$POUSPMBHBJOTUCPJMFSSBUJOHMBCFM$PSSFDU
if necessary to select the proper boiler size.
)8'"6-5
&91"/4*0/
#3%
Expansion Control Board
hardware has failed.
Residential Ultra Boilers do not
use an Expansion Control Board.
Requires manual reset.
$IFDLCPJMFSTJ[FTFMFDUFEJO6$POUSPMBHBJOTUCPJMFSSBUJOHMBCFM$PSSFDU
if necessary to select the proper boiler size.
(7'"6-5
&91"/4*0/
#3%
Gas valve output of the
Expansion Board
Residential Ultra Boilers do not
use an Expansion Control Board.
Requires manual reset.
$IFDLCPJMFSTJ[FTFMFDUFEJO6$POUSPMBHBJOTUCPJMFSSBUJOHMBCFM$PSSFDU
if necessary to select the proper boiler size.
&91#0"3%
$0.'"6-5
Communication between the
Expansion Control Board and
UIF6$POUSPM#PBSEIBTGBJMFE
Residential Ultra Boilers do not
use an Expansion Control Board.
Requires manual reset.
$IFDLCPJMFSTJ[FTFMFDUFEJO6$POUSPMBHBJOTUCPJMFSSBUJOHMBCFM$PSSFDU
if necessary to select the proper boiler size.
Troubleshooting (continued)
Figure 112 Troubleshooting suggestions for Ultra boilers (continued)