Supply And Return Piping - Watts Aerco BENCHMARK 750 User Manual

Benchmark 750 – 1000 Boiler User Manual - INTERNATIONAL
1. Remove the lifting bar from its shipping location at the rear of the unit (Figure 2-2, View
A). Retain the attaching hardware consisting of two (2) hex head cap screws, hex nuts
and flat washers.
2. Remove the top shroud from the boiler by grasping the handle on the top of the unit and
lifting straight up. Locate the lifting tab at the top-rear of the heat exchanger.
3. Refer to Figure 2-2, View B and attach the lifting bar to the heat exchanger lifting tab
using the hardware removed in step 1. The upper end of the lifting bar containing the oval
cutout should be positioned over the top of the heat exchanger as shown.
4. Using proper rigging equipment, capable of supporting 1000 to 1200 lbs. (435 – 544 kg),
lift the boiler and position it on the housekeeping pad.
5. After the boiler is properly set on the pad, detach the lifting bar and replace the shroud on
the top of the unit.
6. Retain the lifting bar for possible reuse at the installation site.
LIFTING TAB
1" (2.54 cm)
NATURAL
GAS INLET
LIFTING
BAR IN
SHIPPING
POSITION
VIEW A - SHIPPING POSITION
In multiple unit installations, it is important to plan the position of each unit in advance. Sufficient
space for piping connections and future service/maintenance requirements must also be taken
into consideration. All piping must include ample provisions for expansion.

2.5 SUPPLY AND RETURN PIPING

Benchmark 750 and 1000 Heating Boilers have 3" (7.62 cm) 150# flanges for the water system
supply and return piping connections. The physical location of the supply and return piping
connections are on the rear of the unit as shown in Figure 2-3. Refer to Appendix E for
dimensional data.
When connecting the hot water outlet and cold water inlet to building piping, first make sure the
mating surfaces are thoroughly clean. AERCO recommends using Loctite ® 7649 to prime the
mating surfaces and then Loctite 567 as pipe dope. Do NOT use Teflon tape.
Page 16 of 170
11/03/2016
CHAPTER 2 – INSTALLATION
Attachment of Lifting Bar
Figure 2-2: Heating Boiler Lifting Provisions
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
LIFTING BAR IN
LIFTING POSITION
VIEW B - LIFTING POSITION
OMM-0119_0A
GF-130-I