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6
A. PRESSURE TEST BLOCK ASSEMBLY
1. Make up cold water supply connection to the boiler.
2. Install pressure gauge or pressure-temperature gauge
in tapping provided. See Boiler Dimensional
drawing, Figure 7.1 (Section 7).
3. Plug all open tappings in the boiler and fill with
water. Apply approximately thirty (30) psig pressure.
Check to make certain that all joints and fittings are
water tight.
4. After all joints and connections have been proven
tight, remove cold water supply and plugs from
all tappings that are to be used. See Figure 7.1
(Section 7) for tapping locations.
B. BOILER RETURN CLEARANCE
Return piping must allow for opening and closing
Burner Mounting Plate. PB Heat, LLC suggests installing
a 1-1/4 NPT tee, a 90° elbow, and a 1-1/4 NPT x 5"
long nipple in the return tapping before a vertical stand
pipe is used.
C. STEAM BOILER PIPING
1. Refer to the Steam Installation Survey and
Hydronics Institute Residential Hydronic Heating
Installation/Design Guide for guidance.
2. See Figures 3.1 and 3.2. The return from system
should always enter equalizer through Hartford
Loop, 2" to 4" below normal water line (see
dimensional drawing for normal water line).
3. See Table 3.1 for pipe size information.
4. Use swing joints to attach header to avoid damage
to the boiler due to thermal expansion and
contraction of steam header pipe.
5. Pipe the steam header a minimum of 24" above the
normal water line using swing joints to attach the
risers into the steam header.
3. PIPING AND CONTROLS
PIPING AND CONTROLS
Do not pipe boiler before jacket is
installed.
NOTICE
REAR
FRONT
EQUALIZER
REAR
FRONT
EQUALIZER
HEADER
RISERS
Figure 3.1: Steam Boiler Piping, EC-03
Figure 3.2: Steam Piping, EC-04 to EC-06
Boiler Model No. Risers Header Equalizer
EC/ECT-03-075
EC/ECT-03-100
EC/ECT-03-120
EC/ECT-04-125
EC/ECT-04-175
EC/ECT-04-175
EC/ECT-05-200
EC/ECT-05-250
EC/ECT-06-275
EC/ECT-06-300
1-2"
1-2"
1-2"
2-2"
2-2"
2-2"
2-2"
2-2"
2-2"
2-2"
2-1/2"
2-1/2"
2-1/2"
3"
3"
3"
3
1-1/4"
1-1/4"
1-1/4"
1-1/2"
1-1/2"
1-1/2"
1-1/2"
1-1/2"
1-1/2"
1-1/2"
Table 3.1: Steam Pipe Sizing