Weil-McLain Ultra Series 2 User Manual

Condensing High

Efficiency Gas Boiler

Ratings - (5 sizes)

80 MBH
105 MBH
155 MBH

230 MBH

310 MBH

All with 20-100%

Modulation

Innovative

Innovative combination of appearance, intelligence
and technology.

High Efficiency

Over 92% AFUE and up to 98% for low temperature
applications.

Attractive

The Ultra boiler features a new attractive design for
installation in any setting.

Intelligent

Features PhD Technology - an intelligent system
that delivers Precision Hydronic heating and
hot water needs while maximizing efciency by
measuring and responding to the Data parameters
of your heating system.

High Technology

Cast mono block aluminum heat exchanger. Gas
valve, blower and venturi technology that constantly
maintains optimal air and fuel ratio at all ring
rates.

PhD Technology - Precision Hydronic Data

An intelligent system that delivers Precision Hydronic heating and hot water
needs while maximizing efciency by measuring and responding to the Data
parameters of your heating system.

PhD Technology is built around proven key components that when combined
make the Ultra the most advanced, reliable and efcient boiler available.

The key components
include...

A negative regulated gas valve that
Precisely delivers gas to the boiler;

A variable speed motor that matches
combustion output to your heating needs;

A venturi mixing body that Precisely mixes
air and gas providing higher efciency;

System intelligence with the Ultra Control
Module which maintains proper, efcient
and Precise Hydronic heat through inputs
of all system Data;

The Ultra Control Module, a microprocessor
electronic control, responds to signals
from the room thermostat, supply water
temperature sensor, return water temperature
sensor, ue temperature sensor, domestic hot
water aquastat, summer/winter switch and
outdoor temperature sensor. The module
automatically adjusts blower speed and gas
ow rate to modulate boiler ring rate to closely
match boiler output for space heating or DHW
heating demand.

A cast aluminum mono block heat
exchanger designed to operate in low
temperature condensing applications;

Pre-mix stainless steel burner designed
for perfect ring rate modulation,
efciency, clean combustion and quiet
operation.

The cast aluminum heat exchanger features
a mono block design. This low mass heat
exchanger heats faster, providing heat to the
system quicker. This aluminum block has
been specically designed to work in low
return temperature applications in condensing
mode.

High grade stainless steel burner with woven
steel ber mesh. Burner uses pre-mixed
air and gas providing for a 20% to 100%
modulating ring rate. The Ultra burner
features long life, quiet operation, high
efciency and cleaner combustion for low
NOx applications.

The blower, gas valve and venturi all work
in concert to provide the proper fuel and air
mixture for precise combustion. The blower
pulls in air and gas through the venturi. The
air and gas mix inside the blower and are
pushed into the burner for combustion. The
gas valve senses suction from the blower,
allowing gas to ow only if combustion air is
owing and proper combustion is achieved.

The 4-digit electronic display with
programming buttons and data port make
entering and receiving information very
easy. There are two levels of information:
User Level and Contractor Level. The User
Level is used to: Turn space and DHW
heating “on” or “off”; set space heating
temperature and boiler circulator operation;
display soft and hard lockout codes for easy
troubleshooting. The Contractor Level is
accessible through the use of a special
code that is entered through the front panel
or with a computer interface control kit and a
laptop computer. This access can be used
to customize the Ultra boiler to each specic
job application. Adjustments can be made
for high altitude, outdoor reset, boost timing
and much more...