Catalogue

8 UH-PRC001-EN
Application Consideration
increase the downward projection of
heat by as much as 45% over units
without diffusers.
Model P Units with the Louver Cone
Diffusers can also be used to blanket
doorways effectively, as shown in
Figure 2 by simply adjusting half of
the louvers vertically, and half closed.
Model S horizontal-type units are
ideal for mounting in plant areas
where ceilings are low. In fact, due to
the extremely small height of the
Model S, and because all piping
connections are made at the back of
the unit, the Model S provides a
greater saving in headroom than
other horizontal unit heater makes.
As illustrated in Figure 2, the Model S
Unit Heaters may be mounted
conveniently from the ceiling, or
from building structural supports and
beams. With Louver Fin Diffusers,
they are ideal for blanketing
windows, and Model S “Bypass”
Unit Heaters, provide further
flexibility of application where
greater throw and more effective
distribution of air in the living zone is
required.
Horizontal and Vertical Unit
Heater Piping and Instalation
The illustrations in this portion of the
catalog depict five different typical
piping configurations. Proper
selection should be based on the
operational characteristics of the
source supply. For selection and
sizing of piping, traps, filters and
other piping specialities, ASHRAE
guides and specialty manufacturer's
literature should be consulted. We
assume that the type and total design
of systems has been selected or
approved by a qualified engineer.
The installation and service manual
should be consulted for further
information on installation,
operation, drainage and system
cleaning.
Piping and installation is typical for
both horizontal and vertical unit
heaters – except side connections.
Figure 3.
Figure 4.
RETURN
SUPPLY
GATE VALVE
"LOW PRESSURE STEAM GRAVITY"
GATE VALVE
AIR VENT
MIN. SIZE 3/4
CHECK VALVE
PITCH UP
10" MIN. (254 MM)
PITCH UP
D-6059