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SEP/04/2008/THU 09:19 AM
UTC TECH PUB
FAX Ho. 317 240 5662
P. 018/018
be prepared for each 10 gallons of boiler water.
(Check water capacity of boiler). Pour the solution in
any convenient opening at, or above, the flow tapping.
Fill boiler to flow tapping and adjust fire manually to
maintain simmering for 6 or 6 hours. Increase fire to
build up 5-pounds pressure and "blow down" boiler.
"Blow down" boiler again as in Step 2, then flush con¬
tinuously until it is .certain that boiler is free of the
soda. After the boiler has been thoroughly cleaned,
add fresh, clear water to the proper level in the heat¬
ing system. The degree of acidity or alkaline should
not exceed a pH value of 7 to 8. "
RELAYS OR R t LOTS
IF SINGLE U(YIT
STREAM PRESS./
WATER TEMP.
—,
HI-LIMIT
IS
ROOM
-
THERMOSTAT
(ANTICIPATOR .SETTING 0.4)'
POWER
SUPPLY
=E TRANSFORMER
W
Z4V
REQUIRED
^ ON STEAM
BOILERS ONLY
BRYANT
GAS VALVE OR
CONTROLLER
Figure 34 - D4 (Natural) Steam and Water Non-100%
Shutoff. - D2 (Propane) and D5 (Natural) Steam and
Water-100% Shutoff.
MANUAL SWITCH
HOT
OPERATING
iC'CnTROL' /'
■'.MAKES1'. ION ,TEMP-RISE-
PILOTS OR PILOT. RELAYS
HIGH
: LIMIT
' e
e
_J GPO UNO
TRANSFORMER
H-*R 182 A
RELAY
BRYANT
VALVE
OR
CONTROLLER
S'Ll.-'
I,,;. ■ .*.•./•■ y V
• *6 -nv
.-j ■
t
THERMOSTAT
. ..
' WoTOR':
...
V.IV-,. • > -1
,'V.
. '
■
,
(ANTICIPATOR
a. Ain,
..■w^a
\
SETTM
504
)
■ .
'V ■ • .'.•■•rtf vv>y
FORCED WATER CIRCULATION FOR 246 BOILER
, CONTROL SHOULD BE LOCATED IN TAPPING "G" (SEE PAGE 6) END SECTION OPPOSITE FROM LIMIT CONTROL AND THE
TEMP-ALT-GAUGE INSTALLED IN THE TOP '/£" TAPPING.
CLEANING THE BOILER
The flue, passages between sections should lbe ex-
THE
pilotLE.
___
arnined yearly and cleaned as required.
j—1
~~1
.
,
j'i
.
.
i,.„
v;,
......
p p
t
h.
I..,
...
1. Turn
off electrical power supply and gas
supply
to
IT Ti
9 °~°
required
boiler.
"
'
—
jLJ
sas
2
. Remove front casing panel(s).
--r-rj
n
'
HI- TEMPERATURE
^THERMOSTAT
2. Remove burner doors and burners.
water limit
suitable
for
w
4. Remove top cover from draft hood(s).
* f
)
circuit
6. Clean flue passages between sections with a wire
^
7
flue brush.
—/ u-—' I ■■ ■ -■>
-
a6S4S9
6
. Qlean out the bottom of boiler.
,
Figure 36 - D-6 Controls 4, 5, & 6 sizes only
7, -Reassemble boiler by reversing above steps.
(Millivolt, Thermopile pilot,—Nat, gas)
P P
T H
o 0-0 o
gas valve
REQUIRED
ON'STEAM
- BOILERS
ONLY
HI - TEMPERATURE
WATER LIMIT
-THERMOSTAT
SUITABLE FOR
millivolt
circuit
Figure 36 - D-6 Controls 4, 5, & 6 sizes only
(Millivolt, Thermopile pilot,—Nat, gas)
- 18
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