Waterworks 25 Thermostatic Valve - Manual

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.25
THERMOSTATIC VALVE
INSTALLATION GUIDELINES
Page 1 of 2 6.18.2014
These guidelines have been prepared for the professional contractor to aid in the installation of:
.25 THERMOSTATIC VALVE STYLE NO. GUTH78, GU78TH (UK)
All dimensions are based on original specification and are subject to change and variation.
Please consult your Design Associate for current specifications.
Style No. GUTH78†
Code No. GUSV78R
SPECIFICATIONS:
Fitting Hole Diameter Ш6-5/8" - Ш7"
(Ш168mm - Ø178mm)*
Inlet/Outlet Connection
Size & Type: 3/4" Female NPT†
Recommended Water
Pressure: 45 psi (3 Bar)
Rough-in Depth: 3-1/8" MIN - 4" MAX
(79mm MIN - 102mm MAX)
Unrestricted Maximum
Flow Rate: 15gpm @ 45 psi
(56 L/min @ 3 Bar)
Valve Material: Bi-Metallic Strip
Water Pressure: 20 psi MIN - 80psi MAX
(1.4 Bar Min - 5.5 Bar Max)
* Ш6-5/8" - Ш7" (Ш168mm - Ø178mm) hole is required for
servicing.
† UK Style No. GU78TH supplied with 4 BSP Adapters,
assembly required.
IMPORTANT:
¾ To ensure this product is installed properly, you
must read and follow these guidelines.
¾ The owner/user of this product must keep this
information for future reference.
¾ This valve includes integrated service stops. Make
sure the tile guard is in place.
¾ This valve features anti-scald protection. The risk of
scalding exists until the installer had properly
calibrated/adjusted the temperature setting during
final trim installation.
¾ Valve body rough-in depth is measured from the
centerline of the inlets to the surface of the finished
wall and varies depending on the trim used. See
step #2.
¾ This thermostatic valve only mixes hot and cold
water and does not have volume control or shut off
capability. A diverter or wall valves (SOLD
SEPARATELY) control on/off/volume and must be
installed for each fitting that will have water flowing
to it.
¾ This product must be installed by a professional
licensed contractor.
¾ If soldering any connections, remove cartridge to
prevent damage to seals and internal assembly.
¾ The trim should be on-site prior to rough in and
allows the installer to visualize the installation.
¾ Inspect this product to assure you have all parts
shown that are required for proper installation.
¾ Check local building and plumbing codes to ensure
that your installation conforms to all applicable
requirements. In the State of Massachusetts, all
installations must comply with the rules and
regulations set forth within 248 CMR.
¾ Supply fittings are designed in accordance with
pressure and temperature ratings specified in ASME
A112.18.1/B125.
¾ If valve is going to remain unused for an extended
period of time (over 3 months), then the water to
the valve should be shut off (via service stops or
system control valve) and the volume control valves
should be opened to allow the water in the
thermostatic valve to evaporate. This is to keep the
cartridge from being exposed to stagnant or hard
water, which can cause the valve to malfunction.
ROUGH-IN:
1.
Make sure the valve body is positioned according to
valve markings so the inlets are situated with hot
piped on the left and cold piped on the right. See
Figure - 01.
OUTLET
(PLUGGED)
OUTLET FLUSH PLATE
PRE-INSTALLED
OUTLET
(PLUGGED)
OUTLET FLUSH PLATE
PRE-INSTALLED
13/16"
(21mm)
CENTER
OF INLETS
H C
FIGURE - 01
2. IMPORTANT: Valve rough-in depth is measured
from the center of the inlets to the surface of the
finished wall and varies depending on the trim used.
See Figure - 02