Mighty Therm VW - PW Volume Water Heaters
Page 3
A
8-1/2 in.
(216mm)
INLET OUTLET
TOP VIEW
C
C
OPTIONAL
VENT CAP FOR
OUTDOOR USE
DRAFTHOOD
DRAFTHOOD MUST
BE INSTALLED IN
THE FIELD
HEADER
LOCATION
OUTLET
40-9/16 in. (1030mm)
INLET
5-1/2 in.
(140mm)
26-1/2 in.
(673mm)
SIDE VIEW
V
30-3/16 in. (767mm)
B
SECTION 1.
General Information
1A. Introduction
This manual provides installation, operating, and
maintenance instructions for Models VW and PW
Volume Water Heaters, Sizes 175 through 400. Review
all application and installation procedures completely
before proceeding with the installation. Experience has
shown that most operating problems are caused by
improper installation.
The VW-PW heaters are offered in a basic
configuration (see Figure 1). On PW heaters the pump
is factory installed. On VW heaters the pump is field
installed.
1B. Warranty
The VW-PW heaters are sold with a limited
factory warranty.
Make all warranty claims to an authorized Laars
representative or directly to the factory. Claims must
include the heater serial number and model (this
information can be found on the rating plate),
installation date, and name of the installer. Shipping
costs are not included in the warranty coverage.
Some accessory items are shipped in separate
packages. Inspect everything for damage immediately
upon delivery, and advise the transporter of any
shortages or damage. Any such claims should be filed
with the transporter. The transporter will not accept a
claim from the shipper, Laars.
The warranty does not cover damage caused by
improper installation, operation, or field modification.
1C. Technical Assistance
Consult Laars or your local wholesaler with any
questions or problems involving the specification,
installation and operation of Laars equipment. An
experienced technical support staff is ready to assist in
assuring the proper performance and application of
Laars products.
Gas Connection
Size
Water
C
C
V
Connect.
U.S. Only
(Indoor)
Vent
Nat.
Propane
Size
A
B
(Outdoor)
Dia.
Size
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
175
3
/
4
19
1
/
2
13
1
1
/
2
38
18
457
26
1
/
2
673
14
1
/
16
357
23/
2
597
6
152
250
3
/
4
19
1
/
2
13
1
1
/
2
38
22
1
/
2
572
31
787
18
1
/
16
473
24
3
/
4
629
7
178
325
3
/
4
19
1
/
2
13
1
1
/
2
38
26
3
/
4
679
35
3
/
4
908
19
3
/
16
488
25
7
/
8
657
8
203
400
3
/
4
19
1
/
2
13
1
1
/
2
38
31
3
/
4
806
40
1
/
4
1022
22
5
/
8
575
26
7
/
8
683
9
229
Note: Dimensions may vary.
Figure 1. General configuration.
