Installation Instructions
Issue Date February 22, 2013
H91 Series BASOTROL® Shutoff Gas Valve
Applications
The H91 Series BASOTROL valves are two-wire,
electrically operated shutoff valves that automatically
open and close on a demand signal from a thermostat
or other controlling device. These valves can be used
for gas-fired appliances with a maximum operating
pressure of 0.5 psi (35 mbar [3.5 kPa]).
Installation
IMPORTANT: Only qualified personnel should
install or service BASO® Gas Products. These
instructions are a guide for such personnel. Carefully
follow all instructions in this document and all
instructions for the appliance.
!
WARNING: Risk of Explosion, Fire, or
Electric Shock. Label all wires before they are
disconnected when replacing or servicing the H91.
Wiring errors can cause improper or dangerous
operation and may result in an explosion, fire, or
electric shock leading to severe personal injury or
death.
IMPORTANT: Verify that the valve is installed
only in applications where the specified maximum
ambient (surface) temperature and maximum
operating pressure does not exceed the limits in the
Technical Specifications section.
IMPORTANT: Make all gas installations in
accordance with applicable local, national, and
regional regulations.
!
CAUTION: Risk of Electric Shock.
Disconnect power supply before making electrical
connections to avoid electric shock.
!
WARNING: Risk of Explosion or Fire.
Shut off the gas supply at the main manual shutoff
valve before installing or servicing the H91. Failure
to shut off the gas supply can result in the release of
gas during installation or servicing, which can lead to
an explosion or fire, and may result in severe
personal injury or death.
To install the H91 Series valve:
1. Shut off power to the appliance.
2. Shut off the gas at the main manual shutoff valve.
3. Label each wire with the correct terminal
designation prior to disconnection.
4. Compare the voltage on the valve with the power
source voltage to ensure the correct unit is being
installed. For valves with 25-volt coils, use a
National Electrical Code (NEC), Class 2
transformer.
Note: The transformer must be mounted to a
grounded metal enclosure.
5. Ensure that the gas flows through the valve body
in the direction indicated by the “IN” and “OUT” or
by the arrow on the valve body. If the valve is
installed with the gas flow in the opposite
direction of the arrow, leakage can occur.
IMPORTANT: Do not use a wrench on any
surface other than the casting flats provided at the
inlet and outlet ends of the valve body. The H91 may
be damaged in the mounting process if a wrench is
used on any other surface. Using a wrench
incorrectly may void the warranty.
© 2013 BASO Gas Products 1
Part No. BASO-INS-H91, Rev. D www.baso.com
6. Mount the H91 valve on a horizontal manifold
with the magnetic operator pointed up (vertical) or
in a position not exceeding 90° from vertical. The
valve may also be mounted on a vertical manifold
in any position around its axis (Figure 1).
The H91L_, M_, or AM_ valves may be mounted
on a horizontal manifold only. The magnetic
operator should be in the upright position.
In Out
90º 90º
Horizontal mounting limited
to 90º from upright.
Vertica l mounti ng may
be 360º around its axi s
with the ga s f lo w
either up or down.
Figure 1: H91 Mounting Positions
7. Installer must be a trained, experienced, flame
safeguard control technician. Threads of the pipe
and nipples must be smooth and free of tears and
burrs. Steam clean all piping to remove foreign
substances such as cutting oil or thread chips. A
sediment trap should also be installed in
accordance with the National Fuel Gas Code
NFPA 54 (see Figure 3). Mount the valve to the
pipework, use a quality rated pipe tape, UL listed
seal material rated for gasoline, propane, and
other gases. If not available, a quality grade pipe
dope, a light amount on the male threads, starting
two threads away from the first engaging thread. If
pipe dope lodges on the valve seat, it will prevent
proper closure. Remove excess compound after
mounting the valve to the pipework.
!
WARNING: Risk of Explosion or Fire.
Verify that there are no gas leaks by testing with
appropriate equipment. Never use a match or lighter
to test for the presence of gas. Failure to test
properly can lead to an explosion or fire and may
result in severe personal injury or death.
7. Check for leakage:
a. Shut off the gas at the main manual shutoff
valve and open the pressure connection
between the manual shutoff valve and the H91
valve.
b. Connect air tubing with a maximum pressure
of 1-1/2 times the valve’s maximum operating
pressure (as indicated on the valve) to the
opened pressure connection.
c. Paint all valve body connections with a rich
soap and water solution.
If bubbles occur, this is an indication of a leak.
To stop a leak, tighten joints and connections.
Replace the part if the leak cannot be stopped.
If bubbles do not occur, remove the air tubing
and close the pressure connection.
8. Perform the Checkout section before leaving the
installation.
Wiring
!
WARNING: Risk of Shock.
Disconnect the power supply before making
electrical connections to avoid electrical shock or
equipment damage. Ensure that the operating
voltage is identical to the information on the product
identification label.
Non-Polarity Sensitive
Connections
Limit(s)
24 Volt
1
L1 (Hot)
L2 (Neu)
1
Power supply provide disconne ct
means and overload protection
as required.
Note
: Some valves may vary base d on style of conne ct io ns
Figure 2: Typical H91 Wiring
Thermostat
Safety
Control
2 H91 Series BASOTROL Shutoff Gas Valve Installation Instructions
X
Gas Flow
Shutoff Valve
IN
X
Sediment
Trap
3 in. (76.2 mm)
Minimum
Figure 3: Typical H91 Installation
Setup and Adjustments
Checkout
!
WARNING: Risk of Explosion or Fire.
Follow this or an equivalent checkout procedure
after installation. Before leaving the installation,
verify that the gas valve functions properly and that
the system has no gas leaks. Gas leaks can lead to
an explosion or fire, and may result in severe
personal injury or death.
Make sure all components are functioning properly by
performing the following test.
1. Test all joints and connections for leaks with a
rich soap and water solution. If leaks occur, see
Step 8 in the Installation section.
indicates possible
locations f or other control s .
H91
Gas Valve
OUT
X
Burner
Repairs and Replacement
!
CAUTION: Risk of Electric Shock.
Disconnect power supply before making electrical
connections to avoid electric shock.
!
WARNING: Risk of Explosion or Fire.
Shut off the gas supply at the main manual shutoff
valve before installing or servicing the H91. Failure
to shut off the gas supply can result in the release of
gas during installation or servicing, which can lead to
an explosion or fire, and may result in severe
personal injury or death.
2. Close the main manual shutoff valve and wait at
least 5 minutes for unburned gas to escape from
the appliance, and then reopen the shutoff valve.
3. Turn on the main electrical power switch and
close the thermostat contacts. The appliance
should operate in accordance with the
manufacturer’s specified sequence of operation.
4. Turn the thermostat to a low dial setting to open
the contacts. All burner flames should be
extinguished. Repeat Steps 3 and 4 at least three
times.
5. Return the thermostat to a normal setting before
leaving the installation.
H91 Series BASOTROL Shutoff Gas Valve Installation Instructions 3
!
WARNING: Risk of Explosion, Fire, or
Electric Shock. Label all wires before they are
disconnected when replacing or servicing the H91.
Wiring errors can cause improper or dangerous
operation and may result in an explosion, fire, or
electric shock leading to severe personal injury or
death.
Field repairs must not be made to the H91 valve. Any
attempt to repair this assembly voids the
manufacturer’s warranty. For a replacement valve,
contact the original equipment manufacturer or the
nearest BASO Gas Products distributor.
Technical Specifications
Product
Rated Inlet Pressure
Valve Body
Permissible Ambient
(Surface) Temperature
Available Magnetic
Operator Cover Styles
Electrical Rating
Wiring Connections
Inlet and Outlet Pipe Size
Types of Gas
Packaging
Bulk Pack Quantity
Bulk Pack Weight
Agency Listing
Specification Standards
Performance specifications are nominal and conform to acceptable industry standards. All agency certification of BASO products is performed
under dry and controlled indoor environmental conditions. Use of BASO products beyond these conditions is not recommended and may void
the warranty. Product must be protected if exposed to water (dripping, spraying, rain, etc.) or other harsh environments. The original
equipment manufacturer or end user is responsible for the correct application of BASO products. Consult BASO Gas Products LLC for
questionable applications. BASO Gas Products LLC shall not be liable for damages or product malfunctions resulting from misapplication or
misuse of its products.
Refer to the H91 Series BASOTROL® Automatic Gas Valve Product Bulletin (BASO-PB-H91) for necessary information on operating and
performance specifications for this product.
H91 Series BASOTROL Shutoff Gas Valve
0.5 psi (35 mbar [3.5 kPa])
Aluminum
CSA: -40 to 175ºF (-40 to 79ºC)
UL: -40 to 140ºF (-40 to 60ºC) (except H91E_ and H91L_ -40 to 125ºF [-40 to 52ºC])
Aluminum side conduit hub
Aluminum top conduit hub
Aluminum top outlet without conduit hub
Aluminum side outlet with eyelet
Steel with top conduit hub (UL Listed)
Plastic with 1/4 in. (6.35 mm) male quick-connect terminals
25 VAC, 60 Hz, 0.3 A, 5 W
208/240 VAC, 60 Hz, 0.03 A, 5 W
120 VAC, 60 Hz, 0.05 A, 5 W
25 VAC, 60 Hz, 0.4 A, 7.5 W
240 VAC, 60 Hz, 0.04 A, 7 W
120 VAC, 60 Hz, 0.08 A, 7 W
240 VAC, 60 Hz, 0.03 A, 5 W
208/240 VAC, 60 Hz, 0.037 A, 6 W
12 VDC, 0.5 A
1/4 in. (6.35 mm) male quick-connect terminals or 30 in. (762 mm) lead wires
(other lengths are optional)
1/8, 1/4, 3/8, 1/2, 3/4, and 1 in. NPT; 1/4, 3/8, and 1/2 in. cc; 3/8 Rp
Natural, Liquefied Petroleum (LP), or LP gas-air mixtures
Bulk pack supplied to original equipment manufacturer (individual pack option al)
40 or 80 (depending on the valve size)
40 to 52 lb (18 to 24 kg)
CSA Certificate Number 229521-1656058 except H91TB
Australian Gas Association Certificate Number 4235, AGA Class 3 (H91A_, B_, C_, D_, E_,
L_, and M_ only)
UL Recognized File Number MH5939 (H91A_, B_, C_, D_, E_, J_, L_, R_, and W_ only)
(except H91WS and H91RB)
UL Listed File Number MH5939 (H91AA_, AB_, AC_, AD_, AM_, and AR_ only)
ANSI Z21.21, CSA 6.5
AS 4629
UL Standard 429
1007 South 12th Street
PO Box 170
Watertown, WI 53094 www.baso.gas
1-877-227-6427 (1-877-BASOGAS) Published in U.S.A.
4 H91 Series BASOTROL Shutoff Gas Valve Installation Instructions
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